The weirdo prescriptivists who insist that literally can't be used as an emphatic
It's been used that way for decades! It's neither erroneous nor uncommon! You just literally have a stick up your ass, and you should literally take it out!
Actually, this doesn't piss me off as much as I'm pretending, it's only a little annoying. When I'm not doing a bit I don't use literally as a metaphor very often at all. It just feels that every day there's another literally weirdo.
Lots of words have meanings determined by context. Lots of words are used as emphatics even when they cease to be literally true (see! You scanned that literally as meaning something different from context!). That doesn't make those words meaningless. The "literally" wars are an age war of a bygone past; "literally" is simply a context emphatic now. People pretending they're better than others for spreaking in a dated was is, well, it's my pet peeve.