I can see the ops concerns. It is also understandable what the op is trying to say about all the people that the conceding person beat prior. In some ways I would consider this possibly poor etiquette in competition; but absolutely not a rules issue. To each their own choices if they earned the spot in the finals it really is nobodies choice but theirs.
It should be able to be brought up with a flame suit and thumbs downs. OP did not seem rude but rather concerned with these type of actions in general!
Remember boys and girls we are fortunate to ever play or own pinball games at home.
Have fun play pinball!