I've never understood the need for that. If I don't like an album I just don't keep it. All the music I have I like.
This is a wishlist topic.
If another MB user forsees problems or drawbacks when a wish would be granted, it would be good and useful to mention those here.
Else it's good practice on this forum to either support it by +1'ing it, or just abstain from commenting with personal opinions such as "I wouldn't use it".
That would be perfectly alright on a discussion/question board. But not on this wishlist board.
Please don't take this personal, it certainly isn't intended as such.
Back to the wish: Since everything is already in place with regards to 'loved', and it would be a pity if the concept that many users have gotten accustomed to over many years, and it might get lost only because of changed policies at lostfm:
+1