Secondly, it looks like the flip side risk to improper drilling is not having an established workplace violence plan in force:

http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=NEWS_RELEASES&p_id=18000

BRIDGEPORT, Conn. - The U.S. Department of Labor's Occupational Safety and Health Administration has cited Danbury Hospital in Danbury, Conn., for failing to provide its employees with adequate safeguards against workplace violence. OSHA's action follows an inspection begun in January 2010, in response to worker complaints.

OSHA's inspection identified several instances during the past 18 months in which employees in the hospital's psychiatric ward, emergency ward and general medical floors were injured by violent patients. In addition, there have been about 25 cases over the past five years in which hospital employees lost workdays or were put on restricted duty after being injured by patients. OSHA found that the hospital's workplace violence program was incomplete and ineffective at preventing these incidents.

Any comments?
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"The last time I had a "good suprise", I was 5 and it was my birthday"