Is www.freelists.org Safe?

I requested some lists for some groups. They publish all the private contents of your list messages, and they are googleable and searchable by search engines. They arguee that this is "supporting free knowledge", but I think that privacy is not knowledge at all. They say I can disable the lists to be public, but also that I will not be supported anymore if I do that. But I was not able to find the refered option to disable my messages to be published, and when I wrote them to ask about the option I did not get any answer. So I asked for my lists to be deleted, without any respose again. Maybe this paranoid sense of freedom is explained in the terms of use, but I think is unethical because it is not explained openly and wide visible in the main page nor when you suscribe, although is a non-usual approach to the concept of "free knowledge". I made a complaint about this site in FSF explaining my reasons and their demagogic concept of free knowledge, and they agreed with that (but they cannot make anything because they have not enough resources and simply they are not kind of "free software and knowledge police").