Mac
The exitance of other forms of information gathering, from internet gathering, mobile phone and computer tracking and commonplace street and inside cameras, along with recorded information, from councils, the police, Social services, MI5, Supermarkets... et al, virtually renders the carrying of identity cards irrelevant - here certainly - more so in the US
Things once invented about the old Soviet Union during The Clod War are and a part of everyday life in 'The Free West' for a long time
Nowadays, you can't wipe your arse without some official somewhere knowing which hand you used
Too late to worry about it now, I'm afraid