Multiple name + email submitter

[Fonz]

I get these submits from 6 different names and email adresses but their submissions all have the same similarities.

1. They have their description right beneath their title (in the same graphic)
2. They haven't specified a category (always says "Amateur" which is my default category)
3. Their URL's all look the same -> http://somedomain.com/First_Letter_C...somegirlsname/

The IP adress is always different. But the domains all are created in the last 2-3 months and have the same DNS:
NS1.ADVANCEDHOSTERS.COM
NS2.ADVANCEDHOSTERS.COM

the names and email addresses are:

mazzy - webmaster@porn-ouverture.com
adam - adam@sexlinksdaily.com
Serge - sm@pussieslover.com
Kevin - kevin@yourfreesites.com
bob - wm@porn-hot-dreams.com
ariona - support@porn-sexx.com

the domain names are the same as the ones in the email addresses