This was on Buzzfeed - the last paragraph is amazing, criminals have better business sense than a lot of companies:

According to the DHS documents, only 10% of all immigrants entering the United States in the Rio Grande Valley Sector use La Bestia, with the vast majority relying on cars, trucks, and buses to move through Mexico. With those immigrants making up 76% of all undocumented immigrants entering through the southern border, it appears a fraction of undocumented immigrants ever ride the trains.

That’s not to say immigrants don’t use La Bestia: According to DHS, between 350 1,500 people ride the trains daily, typically boarding in the towns of Arriaga and Palenque before disembarking at Tierra Blanca in Veracruz. The train ride is a relatively short one; immigrants are wary of taking the train further because of gang and cartel violence in parts of Mexico further north.

Ironically, the Zetas and MS13 have reportedly become concerned about La Bestia’s dangerous reputation. Immigrants interviewed by DHS indicated the criminal organizations have begun policing the trains and “removing” rapists and robbers to ensure a steady stream of paying immigrant passengers on the trains.