Everybody has their own heroes. Some people will choose athletes. Other people will pick movie stars. For the select few, their ideal role model will be a crude, foul-mouthed character from an adult cartoon show.
There's no way this kid doesn't know he looks like Eric Cartman from 'South Park.' He wouldn't pair a red jacket with that yellow and blue hat otherwise. He isn't hurting anyone, so we say let him carry on with it. At least he isn't dressed like Kenny, so his life isn't in danger.