Not really a grammar thing, but my new favorite pet peeve is when I'm watching a television show and someone says " I'm weary about crossing that river." or "shes a tough competitor and one to be weary of."
Weary is tired.
Leery is the word you're looking for folks!
How can you be tired of something that you've never done? The last example is insulting to the speaker as well as the person they're referring too.
Man do I have the Thread for You!
http://www.e-cigarette-forum.com/forum/general-e-smoking-discussion/511488-pet-peeves.html