Small details that made me lose big chunks of respect for the show

This is a list of small details (small as in 'easily overlooked if you're not paying attrention', not small as in "unimportant") and short lines that made me lose big chunks of respect for an otherwise excellent show.
It's not an exhaustive list, and is something I will come back and add to - I'm not sure yet if I'll add by editing this starting post or adding as replies, but here are three important ones to get things started: (not necessarily in order of importance)

1. "You're not a killer. You're a serial killer!" (S15, Ep14 - "Fluency") - Detective Fontana's (Dennis Farina) accusation aimed at a small-time dealer of various counterfeit products who passed on a quantity of fake flu vaccine (saline solution) after a number of people who were given the vaccine actually died from the illness because they never developed the antibodies.
Here's the thing: this show has a number of writers, all of whom must be, by definition, fairly intelligent people, PLUS there are consultants on police procedure, equipment, terminology/lingo, etc, working on the show, so how is it that a layman like me can catch this jarring detail while none of them do? The correct - and VERY DIFFERENT - categorisation Fontana was looking for is MASS MURDERER, not "serial killer". He's supposed to be a detective, so how could he not know the definition of a serial killer? This line would only ever serve to show him up as ignorant - not something I believe the writers would want to do (unless there was some behind the scenes spat between them and Farina that I'm not aware of!?).
You can easily look this up, but after many, many films and many, many episodes of many different crime and detective shows featuring serial killers, I'm sure most of you must know that a serial killer kills a series of people that have some aspect in common, whether it be a physical or a personality trait; furthermore, serial killers almost always kill directly (as opposed to remotely), and will kill their victims one by one (by preference), not as a group.
Someone who kills an unconnected (except perhaps by geographical proximity) mass of people, indiscriminately, usually simultauneously and possibly remotely, or indirectly, is a mass murderer (and that's IF intent can be proven, otherwise I suppose it would be mass manslaughter, which may not even be an actual category in usage). OF COURSE, the point of Detective Fontana's line was to hype up the accusation, to throw something with big impact at the criminal, a loaded definition to startle and scare, it wouldn't have to be a charge that would stick, HOWEVER "mass murderer" has at least as much impact as "serial killer", if not more, and is just as loaded, historically and culturally.
To be fair, Fontana, with his "Gucci loafers", his overly preening sartorial obsession, is actually portrayed as a bit buffoonish and a bit thick - at one point, in another episode, after Det. Green picks up a coffee cup discarded by one brother of a duo of TWIN suspects for the DNA on it, Fontana bemoans that they only have ONE brother's DNA, before Green points out that they're IDENTICAL TWINS (which Fontana was well aware of) - thus with IDENTICAL DNA! So maybe this dumbassery is in character, but I still feel it's unforgivable of a detective with many years of experience to mis-diagnose "serial killer".


2. "Is this because I'm a lesbian?" (S15, Ep13 - "Ain't No Love") - A.D.A. Serena Southerlyn's parting shot to the bow of her boss, D.A. Branch, who had just fired her, already (and quite rightly) has its own separate post here, but it bears repeating. This was her response to being, let's say "let go" rather than fired, as it was done in a positive rather than aggressive or negative way, and her line comes after a very clear, perfectly explained reasoning for being let go, that ENTIRELY revolved around her temperament and approach to the job, to do with her passionate stances, which would have suited her more to being on the other side of the court, as a defender, rather than as a "cold-blooded", dispassionate prosecutor, so for her to bring up something that no character on the show was ever even hinted at knowing about, after already having the reason for being let go very beautifully explained by Branch, was simply ridiculous.
I read that Elisabeth Röhm wanted to go out with a bang rather than a whimper, so she apparently discussed with the writers (and presumably the producers too) her final scene, and this is how they chose to send her off. I get that impulse of writing in a bit of a curveball for a character's farewell, BUT the line is so out of the blue and rings so hollow that it only served to be utterly laughable. To me it sounded exactly like Ali G hilariously blurting his "Is it coz I is black?" line at any random, nonsensical "opportunities". Terrible writing choice that should have been caught and easily edited out after filming the episode once they (surely) must have seen how badly it played on screen.


3. "Splatter/spatter" - I'm sure I've heard Detective Green (Jesse L. Martin) use the erroneous "blood splatter" at least once, although I couldn't quote the episode right now. He used the incorrect version of the term even though he had previously (and afterwards) used the correct "blood spatter" on quite a few other occasions!
This is going to be a big bugbear of any forensic scientist, and especially blood spatter analysts (obviously). Dexter was one good example of a great show always at pains to use the correct term, as you might expect, and this issue has now become a pretty good indicator to me for working out whether a new detective /crime show is any good: as soon as you hear "splatter" instead of "spatter" you'll know it's a pile of steaming turds. I recall even one of the (how many dozens of spin-offs do they have now??) C.S.I.s actually using "splatter" on occasion, which you would think would surely never be the case - but it was.


"It's too late... Always has been, always will be...
Too late."