Hakstol likes his team to play this way and clearly coaches them to do it. He likes them to hit people after the whistle. I think it is cheap and low class. It often serves to **** off the other team and cause them to retaliate, resulting in a penalty. As long as the refs don't call it you have to assume it is ok with them. That is unfortunate and I don't get it either.
The only good thing is that despite all their success with it, in the end they lose. I'd get Hak's approach if he had to try to find a way to compete with a less talented team. However, if I had to pick one coach that has wasted the most talented teams for the last decade it would be a pretty easy choice for me. Eventually, that has to catch up with him.