Earlier quoted context omitted.
I'm still not following how that's any different than just owning a subreddit. If I own a subreddit I can moderate the posts in it. Under your model, you're suggesting that I can "moderate" posts that initiate from my server, but not others, and once again I'm still not sure what advantage that has over owning a subreddit?
Frizbee itself is not going to censor their content.
If that information is deleted, the difference between frizbee and reddit becomes so extremely marginal that one really wonders whether this really is a rationalization for allowing people to organize around threatening and stalking people online.
If that information is not removed, does such a site deserve to exist? It may pass some legal standard, but is that a site that differentiates itself in any way except in its support of systematic and continued online stalking??