You would have to really make the police force significantly larger if you go after everyone making idle threats on the internet.
When I wrote it goes to “state of mind”, that can be used to determine pre-meditation which should be used as a “multiplier” in sentencing.
Creating the “thought police” would not be a good step.l
Luckily, the AI takeover happens soon and all humans will be killed.
Solving many problems in the process.