From the link provided a few posts back:

Maybe McCain thinks cautioning kids about creeps is a bad thing, but I doubt it. I even doubt that McCain buys what his own ad is slimily implying--that Obama is some sort of perverted sexual deviant who wants to parade pornographic images in front of the nation's prepubescent children. But the problem is, McCain is treating the American people as if they're stupid enough to believe just that. Obama spokesman Bill Burton called the effort "shameful and downright perverse." I think "cynical" is more accurate.

McCain is running that specific ad here, in Colorado, during prime time news. It is sickening...I'd like to know how they can put out such lies with impunity. (Rhetorical question, please do not answer.)

Sins, I've been listening to NPR all day, about it. I think the shurb is hoping to do all kinds of evil bullshit before he leaves...all of teh attention is off of him, so he thinks he can do whatever he wants.