What you read is WRONG. Is just a friendly warning about the various dangers of crossing the frontier and staying in the US illegally, the first thing that points out is that its far better to try to obtain legally a passport and visa, but since we all know thats not going to happen to most people, and thats also not going to stop them, they give recomendations so that they dont die in the way (thats the part about a woman filling a bottle with water, they advice people that if they are really willing to get through all of this its better to drink salty water if they go through the desert, it can apparently makes you more thirsty, but the risk of dehidration is lower). They NEVER advice people to get false documents or how to get a job... jesus...
Its almost discouraging, but also reminds mexicans they have their rights and cant be treated badly if border patrols find them. I see it as a response to the likely high rate of deaths and imprisonment that happen to people who want to cross the frontier.
The advice for us colombians though is basically "dont go there, cavity search is almost guaranteed at the airport"
more seriously I remember my mother being really pissed off at the way she was treated at the embassy when she was getting her visa, she needed to go to the states for some english courses for her job (she worked with General Electric at that time), the moment you enter there you are basically treated as a criminal, I can only imagine the treatment you get once you got there

Luckily she was with the GE group all the time, but going alone must be a really bad experience, Its disturbing seen my fellow country men so eager to go there and willing to bear the very possible mistreatment and discrimination they are going to recieve just to get out of my poor country T_T