This isn't something that would work at all. Not only are ratings subjective, someone would have to play through every single game listed and rate each one in a logical manner, which would cause another massive issue, like having every single game taken down until Hell (or Naraka, or the Abyss, or whatever underworld you prefer) freezes over, that way they can all be rated. Then, we might as well be waiting for the Apocalypse, because they have to be put back up again, after all.
You've also got to take non-game media that's hosted here into consideration as well. Who's going to rate all of that? How much longer will it make the backlog for things that need to be rated?
And then, if you get the ERSB involved, who the hell is going to pay $1500 per item to get it rated? Especially considering that all media on the site would have to be rated-- and you cannot ask people who make free things to pony up $1500+ to get their things rated so they can be hosted here.
So yeah, no, something like this just ain't gonna fly.