Are you a stickler for the use of correct English?

[yousnoozeyoulose]

I know that people not using "its" and "it's" drives my Dad up the wall, but I'm willing to let it slide. The English lexicon isn't a fixed thing. It shifts around, going into all the nooks and crannies that it really shouldn't be getting into, and an errant apostrophe isn't going to stuff up the sentence too much.

However, the local library of all places posted something on Facebook that said "we're nearly their" and that ruined my day.