It depends on what "allowed" means. The penalty for doing so exceeds that for many minor crimes: http://en.wikipedia.org/wiki/Expatriation_tax#United_States

I guess you cannot avoid a few misses in that much information. I found most of it to be true.

That said, I think it glosses over the fact that US states have huge differences and he has only experienced a subset of them.

Author probably never went to Poland - there is much more drunk people in than in Germany. And I never experienced problems with Germans in Germany. And untaxed work in Germany was quite prevalent prior to last year May. And some other things that should be corrected.

I think he meant that if you want to avoid paying U.S. taxes, you have to give up citizenship, which is true to my understanding.