There have been a lot of posts recently about the annoyance caused by spammers, bots and RIAA sabotage attempts. The simplest solution to implement would be to be able to paste or load text files into the host filter list so that users could share non-grata IP lists on the net. I would guess that most of worst hosts will be on high-bandwidth, fixed-IP connections so I think this measure would be reasonably effective.

At a later stage a 'spam-cache' feature could be added which would automatically update the filter host list with newly identified anti-social IPs each time LW starts up. I know that some other clients have already introduced features of this type.