It's a possibility. It seems certain nationalities get targeted - Pakistanis, Indians, central Americans, even Mexicans. The Pakistani PRs that were detained (to my knowledge) were all released back into Mexico City, not deported.

I did make a point of noting that even people with papers got picked up, because I wanted all my haters to know that even if you have papers, they are no guarantee. However, I don't think that situation is very likely for many people.

Whatever you decide to do with the bureaucracy, I do recommend staying at least for a few months in Mexico and exploring.