It's much easier being honest here. Not particularly for the anonymity part, but the fact that everyone here is actually open-minded. Most folks on my friends list on FB are relatives or schoolmates who had turned rather conservative as they've gotten older ... and it's also none of their business.
I can also be more honest about my relationship with Master on EF; nobody else knows how kinky we are, or the fact that I call him 'Master' - several people on FB just would NOT understand.
Okay, I take it back - the anonymity part is important, as employers can look me up on FB but they can't look me up on EF. They may think something's ethically wrong with me for being kinky.