yup, that is always a possibility, as is adding the exclusion to your searches, but that won't filter, or help avoid those that have been offering and performing BB services from deciding that it may be more profitable to now hide those services and behave like they have never been on offer, this also gives a place for people to post profiles where perhaps they were offered BB during a visit but not advertised.
Like i said in one of the other threads, the thread/discussion will live or die on peoples participation and views, if no one is interested the views will be low and the replies not far behind.