Originally Posted by DWB

That isn't tracked though. For example, if you are from China and you travel to X, Y, Z, and then enter the USA, they are only going to see you came from China, and look at your stamps, if there are any, and possibly ask you where all you have been. There isn't a global database of travelers yet. But it's coming soon, I'm sure.

Even as an American citizen, without the stamps in my passport they have no idea where I've been unless they ask me, or in the case of a criminal, investigate with help of other countries or INTERPOL. But a general traveler, they don't know.