When I check the users registered to my elgg, I met lots of new users pending validation. Their servers are mostly from russian email supliers such as mail.ru, list.ru .... When I click on each of them (the users want to register) I get the warning.  

The content you were trying to access has been removed or you do not have permissions to access it.

I think they can't be the remains of those who gave up their registrations, but they are spams. Am I right?