No you won't be able to unban yourself. Don't do it unless you want to lose your ability to play on PB-enabled servers as well as your SGA status. Any violation gets logged to Evenbalance, no matter what server it's on, and will result in you receiving a global ban.
If you've enabled Punkbuster, have the right flags set in your server manager, and are running the MD5-checks from our MCI, you can assume it's working correctly.
Again, don't test cheats!