Pff I never show my real face! People are weird, creepy, you never know what they'll do. They may hunt you down and stalk you, and even though I know it's possible for someone to get your info regardless of if you post anything or not I'd rather make them work for it. Also what you create really has nothing to do with you, so there's no point in posting pics outside of pining for attention... I have noticed a lot of creators use themselves as reference, most of the time their characters have really similar if not carbon copies of the creator's features.
Coincidentally I do have photos of myself on Facebook, but all my info is fake and only family follow me. If I were to post pics elsewhere there would have to be a really good reason. I did post a pic once on Twitter for a creator vs. creation thing, but deleted it a few hours afterwards. In that time I literally had no reactions, which was nice, I don't think I left the pic up long enough to for people to see it.
Regarding people reacting your to. People are douchebags, they have certain expectations and if you don't meet their standards they'll treat you like crap. Don't think too much into it, if they got a problem they could shove it.