Forum Unable to mass delete users

[محروم.كوم]

Hello,
I noticed that many spammers tried to register but did not confirmed their email, so I decided to delete all unconfirmed users. Through admin I used the command "seek/move users". I searched for all users in group "awaiting email confirmation" and the (long) list I selected all and used command "delete" (instead of "move in -other usergroup - ).

It seems it was deleting each user selected, but after this operation, all users of this usergroup are still alive. Why it does not work?

Thank for suggestions __DEFINE_LIKE_SHARE__