This is not true. Every single human being has multiple different sides/personas depending on the context in which they engage.
For example, many people think "Trolls" are some mythical category of assholes they will never run into in real life, but the thing is, everyone can act like a troll depending on the circumstance. This is why Twitter can't fix the spam problem. Because they think the goal is to eradicate this mythical group of people. But the reality is everyone on Twitter is in one way or another annoying to someone else, without even them realizing.
I am probably much much busier person than OP in real life, but I still have time to post on HN. I am definitely not a weirdo and neurotic who has nothing better to do. I probably spend less time posting online than the OP spend time watch TV shows.
The reason I say this is because without understanding WHO exactly "trolls" are, you will always lose. When you understand trolls are just ordinary people like yourself, only then you can find a way to deal with them.
p.s.
I have acted like a neurotic person on certain forums when I was in a desperate situation, and I am perfectly aware of that. That doesn't mean I am a weirdo who has nothing better to do. Anyone in those situations would probably behave that way too. Knowing that doesn't make it any less annoying, but my point is that I can sympathize, and I know that these people are not all weirdos.