M. J. Powell wrote:
In message ,
steve writes

On Wed, 16 Nov 2005 19:31:14 +0000, Ivor Jones wrote:
I never understand this. Should conversations also be banned. I assume
the
motive is they you get frustrated by only being able to eavesdrop on on
half of the conversation - otherwise the 'campaign' would be about load
conversations not just phone conversations.

The point is that phone users speak more loudly than they would for a
normal conversation.

Mike

Some research suggests that people pay more attention when they only
hear one-half of the conversation:
http://www.useit.com/alertbox/20040412.html