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Your email app will give your messages to other companies, your navigation app will share your exact location with marketers, and your dating app will sell your sexual preferences to the highest bidder, but sure, bars having a way to warn each other which costumers tried to assault a waitress is a bridge to far.
Yeah, I meant people generally give away this data, not you specifically, and again, I can see the potential for abuse, but alcohol isn’t like other goods and services. When a bartender serves you alcohol, they become legally liable for your actions if you overconsume, in civil and (in some states) criminal court, and for good reason; irresponsible alcohol sales can kill people. Regulating how this data can be used is one thing, but sharing data on what customers are liabilities is objectively good, not just bars, but public safety.