Facial Recognition Systems: . In commercial use yet? . Significant growth industry?

[DIYguy]

QUESTION #1

Here in 2014 . . .

. . . Suppose a person walks into a business or commerical establishment [I'm thinking here of all the major corporate chains, big-boxes, eateries, franchises, etc] that has a video camera running

. . . What are the chances that a computer is uploading their facial image data to a corporate data-center,

[and maybe supplemented by uploading any smart-phone ID-data they may be capable of detecting]

. . . And then logging their visit and any purchases they make into a consumer shopping-history database

. . . And then sending them promotional or advertising emails (all within seconds or minutes)

If the person has not explicitly agreed to allow this, to what extent are such practices legal or illegal?

QUESTION #2:

Is this type of use of facial recognition systems simply inevitable with the onslaught of the technology, and pointless to get worried about?

Or is something that so many people will likely strenuously object to that it will be effectively regulated, and limited to only those people who agree to it?