I may be a descriptivist when it comes to language use, but that does not mean there aren't features of how people use language that I find annoying—that is, I have my peeves, too. The difference between me and a prescriptivist is that I'll give up my peeves if I notice that people are actually using words in a way that seems odd to me (as in my pondering the contemporary use of "geek", where I don't say that people are using the word incorrectly, but just that I don't quite get how they are using it).
So one pet peeve of mine is how people use the word "quotation." For example, a student writing about Hitchcock's "Rear Window" just began a sentence by referring to "Jeff's quotation about how 'sometimes it's worse to stay than it is to run' ..." My peeve is that the student is quoting not "Jeff's quotation" but "Jeff's statement". That is, Jeff is not quoting anything when he says that; he's saying something in his own words.
Similarly, I see things like this, in a discussion of Einstein's comment about God not playing dice: "Einstein's quotation was meant to convey his belief that the universe was not randomly designed." Again, Einstein was not quoting anyone, so it seems odd to me to refer to his remark as his quotation.
So that's my pet peeve, but when I'm grading a student's paper that uses "quotation" where I would prefer "statement," "comment," or "remark," I don't correct it, because it's my impression that that is how the word "quotation" is being used these days.
Perhaps I'll get a comment or two now telling me I should mark it as a mistake, but I'm really just wondering if others have the same peeve about this use of "quotation" or not. The usage is surely common enough that it is completely innocuous to many people.