subjectivity is loved by the powerful rule of subjectivity is, at the end of the day, rule of the powerful: when two parties disagree and the situation can be defined in primarily subjective terms, the most powerful party wins by hiding behind outcast, oppressed or unpopular groups with often legitimate (though perhaps subjective, to an extent) grievances, the powerful are able to push through the subjective zeitgeis…
What's subjective about it though? Do you think it is not possible by now for us to collectively come up with an objective definition of what trolling and abusive language is? To me it's pretty clear after spending just a few minutes on Twitter...
There can be no standard legal definition, so what you'll get is psychologists and therapists testifying their opinion with the outcome that someone goes to jail.