An increasing number of pubs and clubs are installing high-tech systems in order to keep troublemakers out, reports ABC News. The systems scan patrons' IDs and photographs and then matches them against a national database. Some clubs are collecting patrons' fingerprints as well. The practice is legal, but Privacy Commissioner Karen Curtis says there is potential for information abuse. "Our greatest concern about the scanning of ID information is the risk of what can happen to it because whenever information is digitized it can be easily used for other purposes," Curtis said.
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