Now I wonder, where did the "negativity" in this thread started? Sorry to say, but the OP already had this not too subtle negativity of "why don't you always behave like this?", implying that forumites in too many cases don't act right. Then, one should not complain if it is pointed out, that even if forumites "behave like this", the result is nonetheless often different than in the given example. (Of course, I don't deny that at least some forumites really behave in a questionable way, more or less often. But this is obviously not the only reason for being heard or not.)
All forums consist of a wide variety of different people, so everyone has to find out how to deal with each other. The simplest and oldest scheme is: cooperate with those who cooperate with you. Take part in discussions as long as they are polite and constructive, and just ignore anyone and anything that isn't. And most important, don't try to convince the ignorant, just step back and ignore them. But unfortunately, some people always want to "win the fight", and even more if the fight is about nothing.