Not to start a "ruckus", but here is the for real scoop on Mexican vanilla. It's almost 10 years old, so I don't know how much has changed, but here it is from the FDA's website:
IMPORT ALERT IA2807
Specific names are mentioned. However, remember that companies can close business and open under new names to escape "brand recognition". For that reason alone, I prefer to avoid Mexican vanilla altogether. I'd rather save up and spend the extra money getting something I KNOW is safe!
Hope I didn't step on anyone's toes!