Is there anyway of disabling signatures per member? I mean if I don't want them to have a signature can I disable it for just them?

Good idea ... we have a lot of people who like to 'abuse' our sig size limit. This would be a good way to show 'em who's boss :D

if you are talking about a single user, that can be done already.
Just go into your admin panel, go to the user area, search for the user you want, and than shut his sig off...not much more to it.

I can't find where you do it. I am just sick of going back and wiping their signatures. I would prefer being able to disable the signature box so that they can't go back and fill it in until its switched back on.