[jtheory]

Note to self: if I renounce my US citizenship, do NOT check the box saying "I'm doing this for tax reasons".

Seriously, this is apparently real law, but according to a "citation needed" bit in wikipedia, has never been enforced.

> The 1996 law included a provision to bar entry to any individual "who officially renounces United States citizenship and who is determined by the Attorney General to have renounced United States citizenship for the purpose of avoiding taxation by the United States."[47] There is no known case of this provision, known as the Reed Amendment, having ever been enforced.[citation needed]