Christian did not make a copy of another company's work for his own profit, all he did was display someone else's work in an exemplary manner.
The "for profit" actions by Christian, selling the domain, very clearly state that the content on the site was not included in the sale.
The only leg Ben has to stand on is if somewhere Chris claimed he was affiliated with the Cheezburger network. If he flat out said, "own your piece of the Cheezburger network now." In that case, his actions would fall under "passing off" or damage to goodwill.
I've yet to see Chris actually do that. Do I think what he did was moral or right? Absolutely not - but I don't believe his actions were illegal, by any means.