Edler felt bad for the play (see his comments on subject) and if he didn't answer for it the issue could have resolved itself in other ways, such as other teammates paying for it.
That being said, not every incident should require 'payback'. I was at the game where Bertuzzi sucker punched Moore, and there are some take-aways. First, Hyman isn't prime Naslund. Second, if the offending player doesn't answer the bell, things can get worse (not defending this). Third, the media and fans should think about their role in encouraging this type of vigilantism.
So good for Edler for manning up but I don't think it was really necessary in this instance and the fight probably had more to do with Simmonds trying to prove his worth on a deep Leafs team than standing up for Hyman.
Also to those idiots suggesting Edler is dirty; he's had a few bone-head moments, and Hyman was certainly one (Staal another), but over 900+ games who hasn't. I can tell you both Thornton and Simmonds are much dirtier players than Edler. People can barely keep their **** together driving every day. I'd like to see anyone keep it cool 100 percent of the time on the ice over 16 seasons without ever doing something stupid.