who is the "We" who will decide which ideas to punish? How will these ideas be defined and measured?

I imagine you could spend seven million years in court trying to pick apart the intention from the action. You would need a perfect lie detector too.

Don't you sometimes want to hit someone? But you don't, right, it was just a thought that popped into your head only to be rejected. How "criminal" is that flash of thought?

Oh, and I haven't seen many encouraging statistics on repeat offending lately, maybe punishment is more for the benefit of angry vindictive vengeful "members of the public" than it is for solving an actual problem?

But yeah, all this crime/punishment logic would be nice if it were at all practical outside of a hollywood scifi movie or a prison builders' convention.