i think the headbutt incident dean got what was coming for him, throughout the whole incident renshaw was being forced to move left by dean.
I'm not entirely convinced that he saw farrar when he looked back, farrar was very close to him when he did so he would have had to turn his head further to see him. Saying that Renshaw shouldn't have moved off his line whatever, and he must know that by now. Not sure it should have resulted in him being kicked off the tour though, a hefty fine and move him to the back of the bunch in that finish would be fair. It does strike me that the commissars respond a little too quickly to events like this – they could have reviewed it a few more times and announced at 8pm or whatever. Also given what happened to Cav in the incident with Hushovd last year (in which both of them are clearly moving towards each other, along with some poorly laid out barriers which become narrower in the last 200m) it does seem his is unpopular with the commisars.