Just ignore it. If you make threads and draw attention to that fact that they've called you a paedo they'll use that to do it all the more and make up more rumours because they know they can get to you. I've read the site myself and it seems like all they do is pick people, find a fault and make out to be 10x worse and make up some lies to go with it.
At the end of the day, they are bored and are just finding something to do by picking on other people over the internet. Don't take it to heart and just rise above them and ignore it. It'll irritate them a lot if you just laugh it off then if you say it's getting to you.