"Never Play" by Keyword?

Is it possible to tag a keyword so any disk with that keyword will not be included in a random playlist? I know I can filter the library by keyword, but it's a pain to always have to type "not kw=Christmas and not kw=holiday" everytime I want to create a random playlist. I'd rather be able to tag those keywords to always be excluded from a random search. Unless, I specifically asked for them to be included - like when it really is Christmas time.

Maybe this could be an enhancement where we could enter keywords that would always be excluded from random playlists? Unless specifically asked for.