ForumRating.com

List of good forums for market place sections on the internet

http://forums.digitalpoint.com ( 10 posts required & 15 days wait period to advertise )
http://www.v7n.com/forums ( 10 posts required)
http://www.namepros.com ( 10 posts required )
http://www.sitepoint.com (paid)
http://www.webhostingtalk.com (10 posts required )
http://www.businessforum.net ( 10 posts required )
http://www.webmaster-talk.com ( 10 posts required to advertise )
http://www.e-topic.com/forums ( 10 posts required )
http://www.namepros.com ( 10 posts required )
http://www.adminfusion.com ( 10 posts required )
http://www.theadminzone.com ( 10 posts required )
http://www.dnforum.com ( paid memberships )
http://www.webmastertalk.in ( 10 posts required )

this list will be regularly updated.

and you are done, simple isnt it ?

Its really simple to do this.

Login Vbulletin Admin Control panel
Go to Users
Go to Search for users
Write the name of user id you wish to delete
You will get combo box with edit, and delete option.
Press Delete and you are done.