The people mentioning deportation probably believe that the rules determining who is or is not allowed in a country are unfair and should be circumvented in at

The people mentioning deportation probably believe that the rules determining who is or is not allowed in a country are unfair and should be circumvented in at least some cases. You might disagree, but perhaps you can think of some other law that you wouldn't want festivals to assist in enforcing. If you can't, do you trust that the government will never pass such a law? If not, you might not want to normalize having facial recognition tech everywhere.