sure, discussion is good and healthy, but the seriousness with which you can take someone's criticism stems from how constructive their POV is.
this is a beta software, designed by well renowned designers.
in the OP's case, something turned out to be too transparent--an issue that's been readily adjusted since B1 was released. if there was a more broad stroked opinion he had about the design, that was founded on constructive criticism, he wouldn't be called a troll. but belittling designers, resorting to name calling, and pointing out a very tiny design element and making it out to be utterly blasphemous is the type of attitude that attracts scoffs and troll-calling.