The note was written in black texter with the capital letters BOB gone over many times.
It was also found in the drawer of the first class toliets... and a UA FA swore she checked it prior to departure.
There was one suspect, but with no proof nothing could be done and they were not detained.
(or maybe they could be sent to guantanimo bay for 2.5 years with no charges laid against them!!)
In any case it is troubling times we are living in... who really would want to risk calling a pranksters bluff?
LNO