Its a wierd one. Last year Voeckler (also Europcar...) was lionised for his tour efforts but if I remember correctly, he gained the yellow jersey and crucial time on a day to St. Flour when the racing was toned down after Hoogerland and Flecha's accident (did Vino also go off that day). He certainly seemed quite opportunistic at the time. Maybe Rolland you can say is quite young and just did something he now regrets - certainly Brad is getting a lot of respect now but he wasn't when he turned the air blue a few days ago.
I think there's also a comparison at some point to Lance Armstrong very deliberately caning it with his team and gaingin a decisive advantage when either Zulle or Ulrich had a mechanical (at the bottom of a climb in the first tour he won ... ? Dunno exactly).
I guess it's one thing when a mechanical happens that your team or the rider is responsible for, like Schleck's chain slip. When an outside party like a spectator intervenes in the racing, it's just a lottery that makes a mockery of the event if you seek to benefit from it.
It's all so subjective, isn't it? Codes of behaviour, rather than hard and fast rules. I rather like that, it matters more when riders chose to behave that way, rather than being obliged by rules.
What happened to Hoogerland (and Flecha) was an individual act of misfortune - I don't think you'd stop for that, especially in a break. The tacks were an attack on the whole peloton and the peloton (led by the MJ, because that's the MJ's responsibility in that kind of situation) reacted.
Armstrong caning it?I think you mean La Grande Motte in 2009 and it was his own teammate he was attacking...