Not the most evil, but very satisfying
At the last office I worked in, there was a paging system that could be accessed from any phone to make an announcement to the whole building. The "All Page" access code was 799.

Any time a new person would come in, we would do an "All Page" to the whole building saying, "New Person, please call 799. New person, 799."

Within seconds, we would inevitably hear the nervous, questioning reply of New Person echoing through the halls, "Hello? Hello? Uh... this is New Person? Hello?"

Got 'em every time.

_{Except for the girl co-worker who thought it was "mean" and would intercept our efforts. NOT COOL.}
( intesvensk can't recall when I last checked the newsletter, Thu 13 Dec 2007, 22:43, Reply)