I sometimes try to have proper conversation, but these days try to make sure I'm not dealing with some form of alt-right bandwagon trolling by checking comment histories. Every single HexagonalKitten comment so far has been about how others get all upset about things, and, of course, 'immigration issues'.
It's not that I have an issue discussing these topics, but at some point I do feel I have to use some quick heuristics to weed out the trolls or 'culture wars' group-thinkers.