One Question...

[pub spears]

Cubans dont stamp passports. You get a little piece of paper stamped. I'm not sure why. I would assume it's because you could have problems going to the USA with it in your passport.

Yes it could possibly be so that someone could hypothetically visit that country from a 3rd party country and then easily remove the evidence from thier passport. It should also be noted that if someone were to hypothetically visit that country illegally and get into a jam....Youre f'd. No embassy help, no medical insurance coverage there or when you hypothetically returned, no rights. Check back !