I think Fielden and Griffin have been hard done by. Mason deserves the 3 games, it sends out a message stamping isn't acceptable.
Having watched it back, i think most people would agree the verbals started as a result of the stamp on his ankle, Fielden thought one of the markers was the culprit and was probably telling them what he thought. Griffin was probably wondering what Fielden was moaning about (him not knowing what Mason had done either) he was probably giving it back telling him to stop being soft or words to that affect
I'd imagine with both Fielden and Griffin getting pumped up and giving each other verbals, Fielden probably didn't even notice Mason coming in from the side, but felt the push/shove/punch whatever. I think with Fielden learning the hard way with Willy Mason a few years back on hesitating, he felt the contact, and thought i'm not getting knocked out again and started throwing and starts swinging. By this point Mason has been dragged away and it's all going off.
Mason is the instigator of a situation that would never have occured had he not stamped on Fielden and then jumped into a heated situation between to innocent parties. Mason causes a fight to start and these two lads now serve a ban for it?
Will also be interesting to see how many bans are dished out for fighting in the remaining games of the season?