Tackling, or attempting to put in a tackle but not being succesful and as a result taking your opponent down, is part of the game. Your intentions are either to get to the ball, or in worst case scenario, to stop your guy from geting into a good position, deliberately making a faul and you will get sanctioned for that, deservedly and on the pitch; but what Suarez did simply shouldn't find its way on any of the sports venues. Biting opponent, kind of nasty habbit of his as a way to release frustrations, needs to be punished and the punishment should to be a hefty one; half a year suspension from all competitions, setting an example and showing the likes of Suarez that nibbling on your adversaries won't be tolerated any longer.