Privacy by design lost

This happened to a friend of mine recently.  He went to a nightclub he used to frequent and before he could say anything they scanned his identification.  This is what I would call the opposite of privacy by design.  Bars and nightclubs are traditionally very privacy friendly.  They follow a credentialing model: validate people before entry and then don’t track them.  Once you’ve established that you meet the criteria for entry (i.e. being over 21), the bars don’t care who you are.  This is harder to do online but can be done with privacy enhancing technology.  But it’s something that comes naturally offline, like in bars.  But now some bars have decided to integrate technology into their operations for tracking and marketing purposes.