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From: koko@uthub.UUCP
Newsgroups: sci.electronics
Subject: Re: Library Book detectors
Message-ID: <441@uthub.toronto.edu>
Date: Fri, 1-May-87 01:30:19 EDT
Article-I.D.: uthub.441
Posted: Fri May  1 01:30:19 1987
Date-Received: Fri, 1-May-87 07:02:05 EDT
References: <146@illusion.UUCP> <868@oliveb.UUCP> <1726@kitty.UUCP> <875@oakhill.UUCP> <1732@kitty.UUCP>
Organization: CSRI, University of Toronto
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>          Of course, one could rip out the sensor, but some libraries glue
> and imbed the sensor in such a fashion as to make it non-trivial to remove.
> The only assured method of defeating a sensor is to wrap the book tightly
> in metal foil - but that's a little obvious while strolling out the library
> door!
> 

Not if the book is concealed in, say, your briefcase!  (However, if you must
display the contents of your briefcase to the desk clerk as you leave, then
you might be in trouble.