I'm sure that'll stop him.

Right?

What are the consequences?

Unless he gets put in a cell he isn't going to stop

And unfortunately this will change absolutely nothing. Trump and his administration will just ignore it like everything else and nobody is willing to take the steps that would be necessary to actually enforce anything like throwing anyone who ignores these orders in jail up to and including Trump himself.

months after it happened... the courts are simply too slow to keep up with trump

Yeah, no shit! But nobody is going to stop him