Famously, on the internet nobody knows you're a dog. Mitch Wagner lists the top 6 words and phrases to prove you're a jerk.
We must hang out on different parts of the Internet, because none of those really come up where I hang out. My list would look more like:
3. But I'm not like that!
2. The people who vote that way are stupid or evil or both
1. We're more evolved
Via Monkeys in My Pants, which I have bookmarked as 24-hour drive thru