The best would be an option to stop them showing in any lists. Or at least something? On kongregate a game preview pop-up at least shows my rating for the game. If I rated it 1/5 or 2/5 I can skip opening the game and move forward to the next one. Here on AG I still cat'n find any way to see my dislike except opening the game page. Which is too long if I'm about to check dozens of games.