>They'd just pay their x% tax and suck it up and consider it cost of doing business.

And then after that the companies will get involved in politics in those places so that it never happens again. This in turn increases the chance of regulatory capture and corruption.

Also, don't forget that increasing the cost of doing business will discourage others from trying. Oh, and there's also the US government too. They might just end up siding with Google and Facebook.