Hello,
I have de-activated a user that started to send spam to others user using the private messaging of ES :
http://awesomescreenshot.com/01e4kc30ec
BUT after that this user continue to send hundred of messages :
http://awesomescreenshot.com/0684kc3ddd
i have finally erased is account
was it due to session time ??? or something going wrong ???
I also would suggest you a new feature :
sending an email to admin when a user activity is quite big
(i know it is not easy to define but maybe 20 private messages in 10 minutes is not so usual !!)
Loïc