The primary danger is that by lumping people with legitimate criminal complaints in with people who are sad because someone said some mean words to them on the internet, you don't make others more concerned about rudeness, you make them less concerned when someone has a real problem.
And while it's a different discussion all together, I think examining why conflating criminal harassment and "trolling" has become in vogue would teach us a lot about how power is used in the modern age.
On the contrary. One of my side-projects is involved with the running an Internet-to-PSTN wake-up-call service. The service is free-to-use in the US (because domestic calling is so cheap) which also means it gets used by criminal-harassers who send wake-up calls at 4am to their targets (we do aggressively rate-limit which helps mitigate these issues). We are frequently contacted by local police departments across the country (we don't spoof our Caller ID) seeking information about who made the call (roughly 25% of the time we get a subpoena or court order) and almost always we see the call request came from an IP address hiding behind a simple PHP web proxy script or a Tor node.
While my story is an anecdote it does demonstrate that it is very easy to hide your identity online for quick hit-and-run harrassment - it's not that LE have abdicated - it's that they've done all they can do - because what can you do with an IP address allocated to Egypt?
While the issue I've described is a societal problem, it does have a technical solution: if the phone numbering system were redesigned so they worked more like email addresses then people could change their phone numbers or use disposable numbers and aliases which would put an immediate end to unwanted calls... but that's not going to happen.
There seem to be a lot of apps for whitelisting generally.
I've had it installed for about an hour now and indeed have not received a single spam call. Experiment at your own discretion.
Or even charge a one-time $1 to sign up, and then free wake-up calls for the life of the account.
How does converting the internet into a police state help combat anonymous harassment? Privacy is a tool to prevent harassment; not the other way around.
Actual trolling is way less worrying. I don't like it and I certainly wouldn't partake in it, but you can actually ignore it. Harassment, not so.
It's really simple. First you make outrageous claims, then you define everyone who disagrees as a harasser. Find the one tweet or comment that's a bit off color, and pretend that's representative. Or just false flag it.
It's the digital version of how to discredit an opposing view or protest, you just need one person smashing a bus stop or looting a store. Once you have enough fear, it becomes self justifying.
Who would be the victim(s), and who would be the harasser(s)?