OK, So it seems that it is more than just educational institutions. It applies to newspapers an so mostly. I know that if they are reputable educational institutions and they like to use your information for research, they need to get your consent. If they don't you don't have to take them to court, just report them to their local ethical commission (or similar) they could loose their license to do research! or worse!
I agree, it sound like an empty threat, although if this site has an obligation to act on infringements of the privacy of their members....
Thank you for your responses!
Javit