That isn't quite true.  There are trolls on the internet who love fucking with people who are passionate about something--doesn't matter if it's Audis, fountain pens, comic books, or bitcoin.  Their mission is to draw attention to themselves in a negative way, because to them any attention is good attention, and they're obviously not getting enough of the healthy kind of it in real life.

So just because you see someone trolling as hard as they can against bitcoin on a bitcoin forum, it doesn't mean they're being paid by anyone to do so.  I used to hear that a lot on the conspiracy theory websites back when I visited them (before I figured out that doing so was affecting my sanity).  People would say that if you don't believe WTC7 was taken down by nanothermite charges, you're being paid by the US government to spread disinformation and so on.  But although that's certainly one possibility, it's remote, and Occam's Razor would suggest that people are doing this for their own pleasure.

Don't know about that.  A person who does such things certainly knows how to save money on travel expenses, although he probably doesn't have much income and money to invest with.

That's the best solution, which a lot more people should avail themselves of.  That ignore button is worth its weight in gold, so to speak.