Do you mean "troll" or "trawl"?
(I'm thinking of an old saying that the best way to get an answer isn't to ask a question, but to say the thing is impossible. Can't remember it well enough to google for the exact form, however).
Trolling is done by hand with a fishing pole, sometimes on a dock.
Trawling is from the back of a boat, generally with a net.
I have a hazy recollection of folks in the early days of 4chan describing 'trolling for idiots' - as in, feigning ignorance to get a rise out of folks. Like, you post a dumb, obviously stupid but infuriating comment and watch people get all worked up about it. You know, for the lulz.
I feel like since then it's changed to just actually being a dumb asshole and enjoying when people are mad at you. Or maybe I've just gotten smarter. In any event at the time it certainly didn't seem like the kind of thing racist lunatics would go out of their way to do. Perhaps more the fool I, as I was a teenager at the time and as such that opinion cannot really be trusted.
if you troll HN for AI related stuff and just read read read, progressively googling the terms you don't understand, eventually the haze will lift and things will start to make some sense.
source: in the middle of doing that right now