Even worse than Luke-Jr promoting such attack is the fact that he's apparently, so far, "getting away with murderer". Depressive. It's as if lots of miners would collude with deepbit to reach >50% and start double-spending to their profit.
It's not quite the same because miner incentives are different. Bitcoin miners have an incentive to kill rivals, but double-spending would damage the value of their investments.
I was not thinking about economic incentives when I wrote that, it was just a comparison about people personal moral values. You have to be a great scumbag to do one thing or another. Before such event I used to think most people would not be such assholes, but apparently, if Eligius remains with that many miners, I was plain wrong on such assumption. We live indeed in a
society of criminals.