People who insist on confusing loose and lose.
People who "identify as." (I identify as as an adverb).
Websites that just reload or have unhelpful error messages when you try to log in. ("Something went wrong.")
Text messages with web links in them (I don't have a smartphone).
People who smoke in hallways, public bathrooms, elevators, etc. when it's posted no smoking! What are you, in junior high?