They know. They are well aware of how nasty they are. It's like when you go somewhere and someone near you stinks to high heaven, someone always suggests "oh, they probably can't even smell it anymore!"; I say bullshit on that on the same premise. The hogs and the reeking freaks are both PRETENDING that they don't know, then WE pretend they don't know to save their fee-fees. Fuck that.