I'm a Gold and have been known to use the toilet while seated in CE on occasion on 2 hour flights. Wasn't aware this labels me as some sort of weirdo/riffraff passenger that the OP would not want sitting near them. In fact to certain destinations (I'm looking at you MUC) it's not a bad idea to have done just that if a flight from for example Russia has arrived before you and the automatic passport gates aren't working as usual. You could be standing waiting to get through for 40 minutes even with an EU passport before you have access to a toilet.