Did you try ask the administrator or owner of the website why they have that rule?

I was on a website about psychic phenomenon one time and saw a rule like that. I asked the administrator what that rule was about. He told me one time a mentally ill person had come to the site and joined in. talking about spirits, ghosts, telekinetic, astro progection and other psychic stuff caused the mentally ill persons symptoms to increase. the result was the person committed suicide and the spouse, parents and others joined in and sued him for wrongful death and they won because the website did not have any disclaimers saying such discussions can cause the mentally ill to go off the deep end and could cause the mentally ill to experience an increase in their mental disorder symptoms. by order of the court now all his websites must contain the same disclaimer that mental disorders can be affected by such discussions that were on his website so the mentally ill were not allowed on his websites. after that I was no longer angry at the rule. the guy was just doing what the courts told him he must do and covering his behind against any future mentally ill persons going over the edge because of his website content.

to me that guy having that rule is no different than websites saying the suicidal people have to use the resources in their locale instead of using mental health websites that are not equipped for suicidal people.

my suggestion talk to that websites administrator, the reason for that rule may be court mandated from some one who had gone over the edge. or he's just making sure no one has to deal with the helpless feelings you get on line when you encounter someone with problems you cant do anything about like mental disorders and suicide.