Well I do think one has to be reasonable. Those folks start a forum becauase they love rats. They may breed them for pets/companion animals or for show. They aren't going to appreciate someone joining who uses the same type of animal as a feeder and well, who can blame them.

Would we enjoy looking at pictures of ball pythons used as feeder snakes? Or have a bunch of show rat breeders come here and lecture us on using rats as feeders?

I think one has to respect the focus of a forum, the aim of those that created it and if it isn't the place for you, then leave them to enjoy their hobby.