I will just post some of the more racist pics, you can read the rest here.
http://www.amren.com/mexguide/mexguide.html

Guide for the Mexican Migrant
Distributed by the Mexican Ministry of Foreign Relations

Do not trust those who offer to take you to “the other side” and ask you to drive a car or to take or carry a package for them. Normally, those packages contain drugs or other prohibited substances. For this reason, many people have ended up in jail.

IF THEY ARREST YOU, YOU HAVE RIGHTS!

Give your real name.

If you are a minor accompanied by an adult, tell the authorities so they do not separate you.

“Search Warrant.”