What I find the most amazing about this whole thing isn't that a couple of people have accused you of being a pedophile, but that you actually need to do damage control. No disrespect intended, but what kind of friends do you have on Facebook if their opinion of you is that easily swayed? Just laugh it off instead of making a big deal out of it.
When people say mean things about me that aren't true, I tell my Facebook friends about it and we all have a good laugh about it.