@llama Projector
sorry for the typo last time. Your post, the long one, was a perfect summary of my thoughts. However, just as in case of muting, facebook offers comprehensive solution to filter your "friends". I'm surprised you agree on FB is the breeding ground of cranks, because that's hardly the case in Hungary. We have more commenters on blogs, so I guess it differs from country to country. At the end it doesn't really matter, does it, you are still on the internet.
About social sciences, just for the sake of the argument, I think when it comes to phenomena realted to groups and masses it can actually be a real science. Like describing the shift in Europe's labor market, or the underlying reasons of the diminishing fertility rate. But on an individual level, well, it's hardly a science.
To add to the original topic, I think these trolls have always existed, but before the internet era we were unable to meet them. Since everyone got access to the same platforms, and anyone is able to argue with 'professionals' on the topic, we just eyewitness the surfacing of these trolls.
During the 80s, if we are speaking about that, when you were in a certain environment, from work to university, you usually experienced only those people's views who were around you, hence you've met less trolls, as the society, your micro-environment in particular, tossed them out rather fast. On the contrary, with the internet we became the minority, who are being tossed out I guess. Suddenly 7 billion people can enter those "rooms" where quality discussions were held, and you are unable to do anything about it. (except muting, and creating closed groups)