The pharmacist getting offended makes no sense

It sounds bad, when he reads the note, but.. remember, that it's WRITTEN language, it's text, it's a damn NOTE.

Get it yet?

Look at the difference between these written texts:

"the blacks"
"the Blacks"

See the difference? In written language, you CAPITALIZE the first letter of a NAME. Therefore, the pharmacist MUST have known the note was specifically talking about people, whose NAME is 'Black', not a group of people that are otherwise assigned that particular word as some kind of descriptive identity designation.

For those that say the doc might've been as bad as moviechat or IMDB board posters, I say she's a doctor, for crying out loud. If a DOCTOR doesn't know proper grammar of simple english, what hope is there for anyone?

Therefore we can assume a doctor is well-educated and intelligent enough to be able to write simple english properly - I don't think they would let you pass the exam(s?) otherwise, or at least it wouldn't make sense.

This means, the doctor, OF COURSE capitalized 'the Blacks' (maybe even as 'The Blacks' - I am not sure if the 'the' needs to be capitalized or not), and a magical pharmacist that can read ANYONE'S handwriting that no one else can, would definitely be able to read the difference between a badly-written 'b' and a badly-written 'B'.

When writers come up with these ideas, they never think them through or understand all the implications, details, consequences, etc., so they think the joke works just fine, but it REALLY doesn't. Written language is so very different from spoken language, but for some reason, board posters and hollyweird writers seem to THINK in 'spoken language', so these kind of little details never even occur to them.

(As a sidenote, wouldn't the doc have the very exact concern about what she's writing, unless she indeed does use the capital B? Wouldn't she get scared about what people might think if she decided to be loose with the correct way of spelling english words, and simply wrote 'the blacks'? This is yet another reason why this couldn't happen. No one is THAT clueless and stupid, especially a doctor shouldn't be.)

There's no WAY this man would've gotten so upset and offended, after reading "the Blacks" on that note - this means, him getting offended makes NO SENSE whatsoever.