I don't use my real name, not so much because I want privacy but because that's stuffy and nerdy and my handles are more aesthetic and expressive. Except on Facebook, because Facebook requires it (well I guess not really, but the registration form asks for it and most people on there use their real names) and Facebook is made to connect with friends, family, acquaintances, co-workers, etc. so it helps if they can find you by name.
I don't use my real picture generally, but I do on Facebook (again, it's the norm there) and dating sites (for obvious reasons) and I think I've uploaded real pictures of me on past social Q&A sites when they allowed multiple pictures (i.e., I probably didn't use real pics as my pfp's). I also have a bunch of pictures of me on Instagram, and two of them on Deviantart.
I don't care about anonymity. I have a personal website that has a pic of me, shows my real name, and has links to maybe two dozen online accounts of mine, and the personal website is discoverable from my blog URL, and I include links to my blog in many of my bios.
I just don't really feel like there's any real danger to it, and I've never been one to care much about security in general.
Even if I were to get an Internet stalker/harasser, it's just the internet, it's highly unlikely they would bother to find out where I live and book a plane ticket and come over and shoot me or something. And I've never gotten an internet stalker yet anyway, people just don't care about me.