Mass delete users?

[iHatton]

Sorry if this is in the wrong section, just move it if it is please.

Hi,

Over the past month I have had to ban around 200 users because of spamming of 'viagra' etc. Not sure whether these are robots or not.

In their signature, they have links to websites selling a load of crap and instead of going through every one of those users and trying to remove the signature, is it possible mass remove signatures or delete the spammers that are banned?

Thanks,