Well, no, that won't "filter out" anything. Hopefully games you're likely to enjoy will crowd out the others, that's the idea. Like I said, try making collections.
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Wait. What? "things you might like based on your rating, purchase, and download history"
Is having games on a collection adding to that as a hidden feature?
So having the collection "vn i hate" is a bad idea to improve my recommendations? (just kidding, but you see what I mean. I use private lists for keeping overview)