Quote:
Originally Posted by freenity
some of them use email activation system. That is when you register you receive a link on your email, after clicking that link your accout will be activated. If you want to make another account you will have to enter another email address.
Another way is checking your ip address, but the problem is that ip usually changes so it doesnt always work.
Or it is possible to download a cookie to your computer with no time limit, so if you want to register another account on your computer you wont can do this.
The problem of this method is that you can register from another computer.
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Cookies can be cleared from your computer quite easily anyway... its impossible to block someone who wants more than 1 account, as they will always find a way, even if they sign up using friends details or whatever.
However you can put all the above precautions into make it a large hassle for people to have multiple accounts, that way 75% of people give up after the first hurdle of having to get a new email address then if it has other checking you only have the small % left who can be bothered to change/remove all the files it checks for...