Forcing the users to register will make it harder, but won't stop them from having multiple accounts of course.
What abour something that's easy to check but hard to make up for a second account!? Like the number on your id. Checking the checksum is easy and mr. average guy has probably problems generating a fake one.
Thing with that is, probably most users aren't willing to enter anything from their id.
Sercit - Mon Aug 04, 2008 4:09 pm
Post subject:
Hrm. I dunno, some people are willing to do a credit card or bank card. Look at Second Life.