If they are asking questions in or world of Warcraft

I do. If they are asking questions in /trade I usually whisper them an answer if I have it. Sometimes it's me who got trolled though. I just /ignore those guys.
or world of Warcraft
I'll say "check out x site" if it's something complicated, and say why x site is good.

I'm not going to say "google/wowhead it" when it's winter veil and a level 12 in IF is asking where to get cookies for the quest. I'll whisper the answer to him.

The same thing happens on the forum here though, OP. Someone can ask a question and he gets his game progression/achievements/armory trolled.