Sorry, but what's the point in this? If you can't edit your own address, it will be still possible for every moron to log in with a new dummy one just to do a couple of offensive posts (until the member name gets blocked, and the game starts again). If you want to lock out stupid people, you have to verify every new address, not to block the old ones. Something like "create a random password and mail it to the entered e-mail". PFO is doing this (and they were occasionally critized for it), but it should work better than the current plans.