Biometrics in the school-lunch line: have we gone over the edge?

In at least one school district --- in Maryland --- students no longer pay for lunch with money or credit cards.  Instead they submit to a palm scan.  Is this a privacy issue their parents should be concerned about?  Should parents have been informed in advance?

http://verdict.justia.com/2012/10/09/biometrics-in-the-school-lunch-line

http://articles.baltimoresun.com/2012-10-02/news/bs-md-ca-school-scan-20121002_1_karen-sarno-lunches-scanner

http://www.washingtonpost.com/local/palm-scanners-in-schools-concern-some-maryland-parents/2012/10/03/94564948-0d5b-11e2-a310-2363842b7057_story.html

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