> If you ask someone to move across the world and don't need them anymore, give them three months on the books to find somewhere else that don't count against their visa. It will give them a chance to get settled and go on interviews. Or don't recruit internationally.

Or, don't relocate [internationally] to a job which can fire you with zero notice or compensation?

Don't get me wrong I agree with the sentiment of it being a Dick Move, but the only protection from that is contractual. Saying "please be nice" is not a serious direction to corporate governance.