It is a new meaning. It has appeared in numerous publications, and has achieved a pretty wide spread. The fact that it was started as a "propaganda tactic" is immaterial.
Advocating pedophilia? I don't know why I'm feeding such an obvious troll. A group of people called someone who they had a (justified) dislike for a bad name and it stuck. Santorum has compared gay sex to bestiality and pedophilia, I think both of those associations are far worse than being associated with the "frothy mix". Giving someone an insulting nickname is a bit childish, but it's harmless and in this case, a response to Santorum using essentially the same tactic to attack the gay community.