Dan I find that a little distasteful and not in the spirit of the forum. Surely if you are not interested in someones opinion you just don't bother reading it.
There's no compulsion to use it, and we have had requests from members who have said this feature would be useful and make a difference to their experience on the forum. If you don't use it, it has no effect on your forum experience.
If there is just one member on here who finds the forum a more pleasant place because, for whatever reason, they can suppress another member's posts, I think it's worthwhile and not at all distasteful. In an ideal world everyone would get along and feel able to voice concern about other members' behaviour, but not everyone is comfortable doing that.
We rely heavily on members to self-moderate, and to challenge and report unacceptable behaviour when self-moderation doesn't work. We're very open to suggestions about improvements we can make to moderation - if anyone wants to help out with moderation, or there are other things we can do to improve, please shout!