1) Make the Validating tab the first tab when you click on Manage Members. Most of the time, admins would go there to manage validating members. Also, if I click on a validating member's IP and go back, I'd have to click on Validating tab again to do this for the next member.
2) The SPAMMER link is too close to the checkbox. It could easily be clicked on accidentally which leads to the next suggesetion.
3) The BAN and SPAMMER links should require a confirmation like for DELETE AND APPROVE.

Yes please to all of them.