Victor66: If you really want to know, I've clicked more than a few times on games which I had already decided they weren't what I wanted, Old games are less and less ok to me, because of graphics and because there is always a new game that does the same thing but better.
This is something I can relate to... with an increasing number of games I keep looking at games where I decided "not for me" a long while ago... because I forgot... I wouldn't want to hide them completely since I often buy gift codes, but some marker "not interested" would be nice. Would also be good for people who own games on other platforms to prevent double-buying. Or even here, since base game + upgrade != upgraded edition game, meaning if you own the one, the other will not show as "in library". To be able to mark those as "ignore" would be a fix for that.