With little warning or regulation, companies are increasingly using facial recognition technology on their customers — as a security measure, they say.But what happens when the systems are actually being used to punish the companies’ enemies?Guest: Kashmir Hill, a technology reporter for The New York Times. Background reading: Madison Square Garden Entertainment, the owner of the arena, has put lawyers who represent people suing it on an “exclusion list” to keep them out of concerts and sporting events.Some have undermined the company’s ban by using a law passed in 1941 to protect theater critics.For more information on today’s episode, visit nytimes.com/thedaily.Transcripts of each episode will be made available by the next workday.