Though a lot of them aren't intentionally hilarious, a lot of notes sent anonymously or to a group are usually pretty funny.

That's why I LOVE a site I came across on My Yahoo page, Passive Aggressive Notes.

People submit notes or signs they've seen at work/gym/apartment buildings/etc. I'm already thinking of a few notes on my condo association's online forum that should totally be up there.

Having a lunch thief in the workplace is something I can relate to, and apparently, others can too. (Though this note enjoys sarcasm a bit more.) This note, however, might be a bit more effective.

Ever had bad service at a restaurant? Having been a waitress in my past, I know all about people who leave bad tips. Though I'm sure I would never stiff someone, leaving a tip like this one might be something I'd consider doing in the future.

Another one to check out is a series of signs from a very cranky landlord. Watch out, Rene Hall.