Kill their advertising revenue you can try to complain here https://adwords.google.com/support/bin/request.py?hl=en_US&ctx=foot telling that awaiting decision on the transfer of the domainname, you can't agree that they make money with a hosted page with a typosquatted domainname or you can try to know the identity (because the billing address will always be right)
Kill their hosting partners according to microsoft some hosting firms have begun to act on complaints of typosquatting, but this is based upon legal letters from big firms, I am not sure they will listen if it is only you so you can try but the person can also move his address to anywhere else as long as the dns.be is doing nothing you are just playing cat and mouse but hey, let the bad guys sweat a little also (and lose money as they won't be paid out) http://www.sedo.com/about/contact.php3
Block their hosting and advertising partners in proxies and firewalls. Hurt the money and you hurt the bad guy