I thought that story was important. An incident like this shows something about the personality of a person. And it's not like a bunch of boys pinned down a kid and all started cutting his hair, and Mittens was just one of those boys. It's pretty clear from the account that Romney was the LEADER of that group of boys. So yes he likes to be a leader, but what kind of leader?
Now I know some people are going to say "that's a long time ago and he's probably changed since then, after all he changes his position on everything else", but I don't buy that. Bullying is one of those things that is a fundamental part of your personality. Ron Paul was a popular athlete, but you could NEVER imagine HIM doing something like that.