![Glasses :)](./images/smilies/glasses.gif)
He may go a little over the top but on this I'm siding with Matt, the referee only took action because it was Richards who'd been booked moments before, and maybe there was little "did I get the yellow card for the tackle wrong " in the referees mind.
As said I've seen plenty of encroachment on the same level as Richards and the referee take no action at all, it's consistency, today Richards was the victim, another day it will be the opposition, it happens we move on.