Its just strange what some players will do, and then still disagree with the outcome of a yellow or red card.
Last season I had an email from county FA reminding all referees not to go to the toilet in public view and to always use the changing room toilets, as its un-professional and a breach of the laws of the game to take a leak behind a tree, (not sure which law mind) however we were also told to take action against any player that went to the toilet behind a tree.
The very same week I had a player take a leak behind a tree so I sent him off and reported to the county FA he got a 10 match ban, now if I hadn't of had the email I wouldn't even of bothered sending him off.