Last time I was at my doctor's medical clinic, I noticed all the shiny new
LCD monitors showing the Windows logon prompt with account Administrator. I
asked the receptionist why. She said so that anyone could sing on any
machine when they needed it, since individual machines lock out so only
signed user or administrator can sign on. They did have the screensaver
timeout so people off the street couldn't sign on. But the only way to make
the multiple workstations usable from for anybody was to use administrator
account on all of them.
This is a bit of a design flaw in the Windows network that means security
is much less than it ought to be.