txaggie: Well I personally don't need a checkmark, or anything - even though I may make mistakes and hit a button too quick - I can just as easly check a box and click too fast, or scrool through 2 pages and click buttons too quickly also. So for me, I would rather just keep things how they are.
BUT if anything is done, I would rather see a checkmark confirmation box next to the button rather then see a whole new page saying "Are you sure..."