As long as the countries at the endpoints agree to the flight, it is hard for others to stop suborbital flights. Commercial airlines have to deal with going ov

As long as the countries at the endpoints agree to the flight, it is hard for others to stop suborbital flights. Commercial airlines have to deal with going over countries that have air forces which can intercept them. Intercepting satellites is quite a bit harder. And attempting to gets everyone mad at you because of how much garbage it creates. In fact people are STILL unhappy with China because of the fallout from their attempt to TEST their capacity to do that in 2007!