Certainly shouldnt click in a thread you have created or posted a comment in if you are in the share program.
Well, very rarely i click them, only if i find something interesting i'll click...otherwise i just ignore them....
I click on a ad everytime i log in. "few times a day". JK. But yes i do, i like to see what people are advertising, another way to see whats really going out there in the world and how they are making money, plus it supports DP...
i never click ads on DP.. not as member and not as guest before i join i always visit this site to get some information...
A couple of times myself. Don't know if they count as I've also logged into Adsense from the same computer.