Oh heck yes - the little ginger annoyance himself (and I don't mean Prince Harry!). Not sure if I can name names, but I think you can all reasonably guess who it is...
Was on a LHR-MAN flight pre-covid and I was getting ready to take my seat when I noticed somebody was in it. I double checked the overhead numbering and then said to him that he was sat in my seat. His reply was that he needed the window seat and I could go elsewhere - so I popped back forwards and explained the situation to one of the cabin crew who came back and turfed him out - much to his disgust. Took him almost a minute to undo all of his wiring before he shuffled out and moved back one row. He then proceeded to get up into the aisle two or three times to film himself sitting down, kept smacking his table up and down ruddy hard and then tried to shove his go-pro through to my window so I pinged the call button and firmly said I was getting annoyed at the gentleman behind me.

And then, to make matters worse, whilst I am obeying the instructions to stay at home when a global threat is on, the bugger goes and has trips abroad because its his "work"