See this thread:
https://twitter.com/terraloire/status/686591765931921409
With the internet being as central to modern society as it is, instead of simply some USENET servers used by some college kids and bored sysadmins, there isn't really a distinction between "threats on the internet" and "threats" any more. (This is not to say that there's no longer a distinction between "idle threats" and "serious threats", of course, just that whether they're on the internet is not a determiner of them being idle.)
> (and if they aren't - what kind of stuff are you spewing out that makes so many people waste their time getting angry with you?)
"Normal" people get angry when they feel threatened. If you are challenging the status quo, it's not unusual for people who benefit from the status quo to get angry at you. This has been true for all of history, and arguing that you shouldn't upset the supporters of the status quo is quite literally arguing that Twitter should not be a platform for free speech.
It honestly sounds to me like you're approaching this from first principles / intuition, instead of any data (or analyses of data, which exist) about how internet harassment actually works.