We've only got ONE case study so far where this has occured, us. I have trouble believing these two have high probabilities.
And how many other cases have we examined in adequate detail? None.
However, I would add one more term to the Drake equation:
fe = the fraction of those who develop high technology but abuse it to bring about their own extinction.
If our case study is any indication, that final term may be quite large enough to resolve Fermi's paradox.
And how would you enforce this?
Possibly through a simple ratio - % of your market is in US vs. % your workforce in US.
Part of the attraction is in plenty of places there is virtually zero government (and legal) oversight. You get to do pretty much whatever you want without a lot of busybody government agents sticking their noses into your business.
Yes, you can do whatever you want - in some cases that has included murdering labor organizers and wrecking the environment. The point is, there are no "externalities". Everything has a cost, and those costs do not vanish in the absence of oversight. In the end they will all have to be paid. A market that ignores this is not sustainable.
What's the difference between a computer salesman and a used car salesman? A used car salesman knows when he's lying.