Instead of just leaving confiscated houses as ageless or dropping them, maybe they should be auctioned off at some special gm "police auction".
This might not be a good idea for small houses/plots, but for the larger houses or houses with a lot of items in them I think it could be a fun thing to do.
Obviously you wouldn't be allowed to check what's in containers etc.
If the gms delete the gold from the sold houses it would also act as a gold sink, not a big one, but still