[REQ] control sessionID's by admins

[craiovaforum]

I want to control somehow users witch register more than one account and since the IP isn't a valid option since more different users may use the same IP, I'm thinking in using the browser's sessionID...

I would like to recive an warning email every time an user tries to register another account and he has the same sessionID with another user. I want to be able to search for duplicate session ID's like I can search now by duplicate IP's...

This could be very helpfull in findind double registrations and in eliminating this sort of "cheating"

thanks