So punishment is always, 10 years this or execution that, but why dont the government deal out banishments any more like in the old days?
I dont see a reason banishment from a country or state or whatever shouldnt be an option in certain cases. If you kick someone out of your country, and never let them back in then theyre someone elses problem, and if that country doesnt accept them they'll just have to wonder around until they find one that does, or get thrown into a detention centre or something.
This obviously isnt a punishment for smaller crimes but there's probably somewhere it would fit. And take care of any over crowded jail problems.
Maybe theres a chance they will be reaccepted after a certain time if they want to come back.

And when theyre banished take away anything they have on them at the time for good measure. Including clothes. and give them unremovable tags so that people can know who they are. If they are trying to find a way to restart thier life they would have to work from scratch. Which would be hard when someone performs a background check on you and finds out your an illegal immigrant or a criminal or whatever.

So what do you think of my idea?
Am i crazy?
Are you morally outraged at my suggestion?
Is there already a form of banishment but now its dressed up with a new fancier word?

Im not too sure of it myself, there are probably alot of gaping holes ive missed.