I would like to suggest a mass select and mark as spam via the discussion list view, with the auto option of any additional Alias' or IP's being de-spammed as well, in a small forum like ours you don't even need to go into a thread to know if it is spam or not.
There are a number of other anti-spam measures that I would love to see implimented;
The ability to deny the posting of links to a usergroup.
ACP level mass delete of users, we recently had 150+ spammers register one night-bigger sites would have much more I am sure, just being able to mass select and delete at the ACP level would be great.
I have added a question (which we didn't have previously) which I hope will slow down some of them.
Sorry if these have been previously suggested, I don't hang out here anymore, and nothing came up in a search.
Thanks for reading!