I don't, which is why I think it's stupid when forum threads come up and people base their answers on the OPs online personalith when he might be the complete opposite IRL, such as on relationship forums and someone writes "You must have no friends, your personality is awful, work on it".
I can be a complete asshat online, and much edgier than I ever am IRL. Especially when it comes to gaming I can be one hell of an elitist asshole.
IRL, though? None of that applies to me. IRL I'm the calm, slightly introverted, considerate guy who get along with everyone. My friends love me because of how kind, considerate, generous and caring I am, and how I always like to bring them along on fun small adventures (their words). I always want people around me to food good, completely the opposite of how I am online, and I don't know how many shoulders I have been to cry on for my best friend, like when she's had a fight with her boyfriend.
Honestly, I think most people are like this. People "let go" and escape their real life personality when they go online, which is why I think it's stupid when people equate the two as the same. Of course it's difficult to know how someone is IRL through a simple forum post or a chat, but as a general rule I always assume that people who post online are like 10 times as nice IRL.