I have refunded 2 members but each time it was a valid reason. The one was when I was moving my server and the site went down just after he signed up. I was too busy with the server to bother with an explanation.
The other was his username was over 40 characters and he emailed and demanded I fix it immediatly so I just refunded him because I was too busy. I did increase the length after that and he has since signed up again
