Quote:
Originally Posted by Azure
I'm about 99% sure they can check the IPs. I'd imagine it is a lot of work though. How many new members do we get every day?
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On a lot of forums, the IP address is visible under the username for moderators/admins. Chances are, the mods here have seen the IP address (or range) for some of the ... celebrities ... discussed in these threads and can tell at a glance when a new name shows up with the same addresses as someone just banned.
On some forums (Wikipedia being one), people with the correct userrights can see what browser you used to access the site, what OS and other technical details. Compare technical details with behavioural, and a returning poster is easy to spot.
Usually, all you need is behavioural evidence. Everyone has a style that someone else will pick up on and associate with the next incarnation of that person.