[mtrimpe]

Or allow users to give your reaction on tweets and have a simple machine learning algorithm block, filter and hide tweets for you based on that.

The real issue here though is that these trolls know that there will be no legal consequences for their actions. That needs to change for anything to change and Twitter does have a key role to play in that... they're just understandably reluctant to do so.

Given that there are real costs attached to addressing the issue (not just legal but also in terms of engagement statistics) as a rational business they will probably delay addressing the issue until the costs of ignoring it (in terms of bad publicity) exceed the benefits.