I found this post in another list I subscribe to. Because of it’s
contents, it bears repeating here. I know it’s applicable to the US, it may
or may not be applicable elsewhere.
I received a telephone call from an individual identifying himself as an AT&T
Service Technician who was conducting a test on our telephone lines.
He stated that to complete the test we should touch nine (9), zero (0), the
pound sign (#) and then hang up.
Luckily, we were suspicious and refused. Upon contacting the telephone
Company we were informed that by pushing 90# you give the requesting
individual full access to your telephone line, which allows them to place
a long distance telephone calls billed to your home phone number. We were
further informed that this scam has been originating from many of the loc
al jails and prisons. I have also verified this with UCB
Please beware. This sounds like an Urban Legend - IT IS NOT!!! I further
called GTE Security this morning and verified that this is definitely
possible. DO NOT press 90# for ANYONE. The GTE Security department
requested that I share this with EVERYONE I KNOW!!! Could
you PLEASE pass this on. If you have mailing lists and/or newsletters
from organizations you are connected with, I encourage you to
pass on this