Offense is both subjective and objective.
Harassment is both subjective and objective.
Historical denialism is both subjective and objective.
Blasphemy is both subjective and objective.
Hate is both subjective and objective.
The more subjectivity there is, the more problems for the rule of law.
So, legislators ought to very careful about passing subjective laws.
Who is the arbiter in such matters?
Politicians? The police? The judiciary? The howling mobs?
This clearly will not do.
Oh wait…
I know!
We can always farm it out to the howling Twitter mobs instead!