nym wrote:

This patch can be used to restrict users by SSL client certificates:

http://bugzilla.wikimedia.org/show_bug.cgi?id=3729

It would be easy to modify nym to hand out one certificate per email address,
for instance, and thus distinguish users behind a single address. (Using tor
would be optional in this case).

timo.jyrinki wrote:

Is there some simple reason why it wouldn't be possible to implement the following:

• a registered user with X modifications made (like X=1000) would not be

affected by IP banning, unless the user itself is also banned by name?

Has it been considered and turned down? Because when banning proxies for a long
time, there are often some users who could be valuable contributors. But even if
they've registered before and editted Wikipedia a lot, they are banned if their
proxy IP (a proxy that they are forced to use) is banned.

robchur wrote:

There's a hell of a lot of discussion about this at bug 550. Also on Meta and
the mailing lists.

*** This bug has been marked as a duplicate of 550 ***