Didn't Shelvey get a ban for that?
He did. Though it has endlessly been described as a stamp in the ever-reliablesensationalist media and therefore ask anyone who never saw it, and possibly 1,000's who did, Shelvey stamped on him.
Anyweay you look at that, deliberately putting your weight on someones ankle is pretty shitty. Same as kicking someone up the arse constitutes above tolerance aggression of some sort regardless of how you interpret violence semantically. The Salah thing + inconsistency is the real issue. Getting caught kicking someone up the arse and being done is fair enough.