A lot of people who grew up with the internet wised up and learned to tolerate/ignore troll behavior. This mostly comes with age, but we can do a better job teaching young internet users that the racist commenter is just looking for attention and should be ignored, that the 200 messages could be coming from a single anti-social person, and that a slew of 1-star reviews may not be coming from a reputable source. This would also involve warnings on the repercussions of handling a hostile situation the wrong way (by engaging in a troll and showing obvious signs of stress or by blithely trusting a DM who appears to be on your side) and more effective ways to cope.
Even as somebody that's used the Internet frequently for 25+ years, I was guilty of falling for some of the traps outlined in this article. I think something like this being taught in schools would shift the state of conversation on the Web dramatically.
edit: a more complete article on this https://the-cauldron.com/you-can-t-just-ignore-the-trolls-8f...