Annoying things people do in the real world

OK. In an effort to provide some variety from politically-charged posts and from one poster constantly making ridiculous demands about how the site should be changed to suit him, let's add another topic: What do people do, in real life -- meaning NOT on-line -- that you find annoying? I'd guess that those who text/talk at the movies are a given, as are those so absorbed in their phones they have no clue of their surroundings, but feel free to add them if you wish. Some of my own include:

-- People who stop in the middle of a supermarket aisle to check their lists, decide on an item, etc., blocking anyone from passing and oblivious to what they're doing. Ditto people having conversations in the middle of an aisle.

-- Drivers who never use turn signals

-- People who have conversations on their phones loud enough for everyone to hear

-- People who let their kids run wild in restaurants and stores

-- Cyclists who think traffic laws don't apply to them and ride right through red lights and stop signs

-- People who waste everyone's time at the post office by having no clue how to mail something and having 8 million questions for the clerk, 99% of which could have been answered via a 5-minute visit to the USPS web site. And it's not a matter of not having computer access, at least in my experience; virtually all of them also have smartphones. In fact, have seem some checking their e-mail while clogging up the line.

-- People who treat bookstores -- the few that are left -- as public libraries, and sit on the floor in aisles reading books.

-- Drivers who figuratively break their necks to pass you, then get in front of you and move like frozen molasses

There are more, but I'm sure you get the idea....