[klooney]

You need moderation for more than legality though, otherwise you can't have open forums like this, that aren't total cesspits.

[Terr_]

Right:

* When a bot farm spams ads for erectile dysfunction pills into every comment thread on your blog... That's "legal content"!

* When your model-train hobbyist site is invaded by posters sharing swastikas and planning neo-nazi rallies, that too is "legal content"--at least outside Germany.

All sorts of deceptive, off-topic, and horribly offensive things are "legal content."