i would tend to go on the copyright infrigement... did you ask permission to use vbulletin word in your domain names?
vBulletin is not in our site domain name. vB is and could be considered an abbreviation of a number of things. Also, several domains have the actual word vBulletin in their name so I can't see that been a problem.
To give an answer to the original question, your site is already on our censor list for a year as it is classified as a warez board and we do not allow discussing or linking to warez sites.