I think it would be good to be able to hide game-listings that you have no interest in upon review. For example, there are games that are run in languages I do not speak. I would hide them to declutter the listings. Similarly, there are campaigns where there would be clear problems between the GM and my play styles. I could hide those so that I don't keep looking at them because I forget what the campaign posting says. Anyway, it would make looking for games easier in my opinion.