wipe phone remotely

[unre4l]

Does anyone know which registry key to delete/modify in order to prevent an exchange admin from wiping your phone remotely to factory defaults. I just found out that if you sync to an exchange server and if that server has some policy pushed down to your phone then they can wipe your phone, SD card and such. I have a personal phone that I sunc with our coporate exchange server but i sure dont want them to be able to wipe it.
Any help is appreciated. Thx.