I hear some of the best ones right here on Paleohacks:
-Repeated questions about how few foods you could eat for the rest of your life. Boy that sounds like fun...sign me up...
-Insistance that paleo = low carb. Paleo = Atkins II?
-Leptin reset. Arrogance, ignorance and a touch of bitters makes a nice paleo cocktail.
-Fascination with bowel movements. Talk about ways to put people off their appetite.
-MUFA is not Omega-6. Pass me the aspirin...
Think before you post people! Many of the questions here make paleo look like a weird eating disorder. I'm sure that they all make sense in light of a specific diet scheme, but no one is expert in the details of the plan that prompts the question, and there are dozens of different plans.