I dont think its just on this board, I am seeing it all over the place.
In the end, I think that many people simply dont really know how to interact with others. Yet, with technology, there is an open, easily accessible platform to do so. Some take inconsequential things extremely seriously, and while I personally enjoy poking the bear sometimes, it has to kind of suck to live that way.
And, of course, many think they are right about absolutely everything, so when the correct information appears it is seen as erroneous. "Reality" is almost being redefined according to how many links one can provide and how zealously one can argue their point, rather than accuracy or facts. Just as relevant, different viewpoints and opinions on items of subjectivity are things to be destroyed or converted.
Its really interesting, albeit equal parts annoying. It might be best to get used to it, I dont see it getting better anytime soon for this board or any other. I think its becoming just how people interact.