Originally Posted by
catocony
The scenario: You're a native-born US citizen who gives up your citizenship for whatever reason. You then want to come back to the US on your foreign passport. Why would ICE hassle you?
Answer: Because you could very easily end up staying. A lot of people want to renounce their citizenship so they don't have to pay US income tax. But, they don't really want to leave the US, they just don't want to pay taxes. So you renounce your citizenship, hand in your US passport, leave the country, come back in, and never leave. You're now a super illegal alien. No one would suspect that you're not a citizen, and if you're of the self-employed sort, no one would ever be the wiser.
I think you are way, way oversimplifying this. People who renounce are generally not tax cheats, they are often tired of being caught up in a bureaucratic mess with ever draconian fines for minor oversights. The most likely people to renounce have been living overseas, often with family ties overseas, for a long long time and have little if any connection to the USA. If the USA didn't impose an onerous burden on them they would problaby not give up their citizenship but the USA chooses to be unduly harsh in their treatment of expats so many are forced to give up their citizenship. It's a shame that our government treats people who live overseas as potential criminals rather than potential ambassadors.