I just discovered this site, and found it pretty amusing.  Some off-color stuff, sure, but also a lot of "laugh-out-loud" stuff. 

An example:

Ok, so you've graduated from singing like a hyena to tapping your fingers & feet. All your habits are annoying & distracting. You are LOUD and obnoxious. No wonder you don't get any work done; you can't stay still for even a minute. Many of us have told you many times to keep it down, but you still don't. How inconsiderate are you? You're not a kid anymore buddy. While I'm at it, STOP WHISTLING too!

You can apparently email such comments anonymously to your noisy coworker.  No word on how that works with the office spam filter, but still…  pretty funny stuff.