Yeah, if you don't find any competition, that's usually not a great thing. The world being as big as it is, you're _probably_ not the first person to think of this particular idea, and it's _usually_ that there's not a market for it.

That said, maybe this is an idea you can niche _up_ with? Instead of just one form of moderation, could you take the basic tech and use it to moderate a whole bunch of nasties that admins don't want to waste time dealing with? You'll want to make sure that the a _paying_ market exists for such tools first, obviously, but it's a potential option.