By using Snapzu, you agree not to make available content that is threatening, harmful, unlawful, abusive, harassing, or libelous.
However, I haven't seen much clarification on what Snapzu considers threatening, harmful, abusive or harassing. Obviously the defenders of /r/fatepeoplehate on reddit have a libertarian definition of "harmful, abusive or harassing" that could use clarification here. In my opinion reddit was justified in their action, even if they weren't as consistent as they might have been. On the other hand, I'm a frequent participant on atheist sites which some religious believers consider abusive or harassing to them when they encounter it.
So my question is where does Snapzu draw the line?