Custom Summoner Icons

I think it'd be pretty cool if summoners had the ability to upload their own summoner icons with RP. If Riot could just find a way to regulate what icons are inappropriate images then it would turn out pretty cool! It'd also be a good way to get rid of that extra RP that I always seem to have lingering.

But then again I don't know the legalities behind Riot getting money for images that aren't theirs, So i could imagine why they have not implemented custom icons.