No problem with people not being allowed on the pitch, or the action the club had to take and obviously people have been asked repeatedly and ignored the club's pleas..
The authorities need to be consistent though.
Previously the 'club doing everything it can' angle was satisfactory. It doesn't look like that's the case now, but with that in mind, it should apply across the board, to other clubs who have repeatedly been warned about fans actions.
I'd expect in the interests of objectivity, the threat of sanctions should also apply elsewhere.