People coming in from a foreign country, when going through federal customs, can be legally detained and questioned for ANY reason no matter how trivial it may seem. The customs agents seen in the show are very much real, however they are also somewhat acting in order to make the show more watchable. A lot of the show is made for entertainment purposes, but the premise is very real. My suggestion is to stop taking shows like this too seriously, but still respect the CBP, HSI and all those who are working to protect our country. Drug trafficking is a huge issue and currently our government is allowing the border to be overrun with illegals and with that comes more drugs, more human trafficking and more bad people.