New ID Scanner offering

Recently saw a product which allows bars / clubs to share a master banned list.  This idea has been around for a long time - sharing a banned list between clubs - but before any clubs decided to purchase such a system, they should google 'barlink' which was a company in Canada which did this and ultimately was banned for offering the service.  Additionally, consumers were so upset, that they created web sites and listed the clubs to boycott.  So in theorey, this sounds like a good idea, the privacy issues of sharing a banned list quickly drown out any perceived benefits.