Jessamyn West  wrote a nice article, Those Darned Users , for WebJunction  in which she cites the Five W's of public access computers:
Who staffs them
What needs to be done
When it should happen
When things go wrong
The second half of the article addresses safety and privacy, two issues inextricably tied to public access computing. It's a worthy read .
Jessamyn West is a well-respected blogger (at least I respect her!). Visit her blog at http://www.librarian.net/ .