[Pietro]

Sorry, but if you lie w/ intent to mislead or misrepresent then you should have your citizenship removed.

This is NOT a trivial thing.

[Verginius Rufus]

I think John Demjanjuk was stripped of his US citizenship on the claim that he had lied about what he had done in WWII. I don’t know if he actually did lie—apparently the key evidence against him was a document which may have been forged by the KGB.