Has anyone experienced a "false checkpoint" in Mexico? I read the State Department's write-up of what to watch for and in several areas they warn of false checkpoints. I've experienced official (or what I assume were official) checkpoints and learned to respect and appreciate the military police presence. But, the "warning" doesn't say anything about what to actually look for or do, which seems sorta useless. Anyone come across one of these so-called false checkpoints and know what to look for? And any advice on what to do if you realize a checkpoint is not legit? Thanks.