I’ve been seeing people say things like “to make sure nothing appropriate happens” or “I never saw him do anything appropriate.” These are two specific examples, but I think I’ve seen others, too. My internal editor is just burning with curiosity to know if it’s just a typo (possible) or if people really think it means the opposite of what it means.
I could care less.
There is nothing inappropriate about “I never saw him do anything appropriate.”
True. But contextually, that’s not what she really meant.
I dunno. Maybe the guy was an idiot and an asshole, and never DID do anything appropriate. 
Appropriately enough, I’ve never heard either of these (mis)usages.