AIs already pillaged all the code in the world. This is fighting a lost fight. We won't manage to force big AI firms that literally props a country to stay afloat to make their AI "forget" or "untrained".
Regulators let the pillaging happen so now AI does know how to code. They dont imitate they truly code.
But IMO the real fight is about things like malus that are the real dangerous and malevolent actor here. They will take your open source code and resell it to big businesses.