The thought(crime)s just occured to me...
If he put this sort of thing on twitter would anyone have paid attention or would they have just ignored him as a fantasist and given him a slap on the wrist (though he might have enjoyed that)?
As to doing something illegal.... pretty much everyone does something illegal at some point. There are that many laws, by-laws, rules and regulations that you're pretty much guaranteed to have come acropper of them at some point (for example being Scottish and inside of the walls of York used to be a capital offence until it was appealed, but just because it hadn't been upheld for a few hundred years didn't make it any less legal).
Besides, the good doctor truly wanted him locked up as judge, jury and executioner, surely she could have just sectioned him and be done with it?