Games I Don't Want/Like (opposite of Wishlist)

I would like to see a feature similar to a Wishlist, but it would be more of an avoid list. I use pricecharting to keep track of my collection (it's very large). Recently, I've begun to replay (or play) my whole collection and get rid of games I do not like enough to keep. I would love an option to check off or avoid a game so that I do not buy it again in the future. Some games look or sound way cooler than they are. I'd like to have a way to prevent Mr from repurchasing games. A list to help me keep track of games I've played, don't like, and never want to purchase (or repurchase accidentally). Right now I need to use a different app for this.