
Dodgy Calls
I used to do 999 calls for BT in a previous life:) They'd just brought in the 'Met Auto' which was/is an automated message asking you to press 5 twice to confirm you need a emergency service. As a 999 op. you put the met auto onto the line if you got a mobile call and it stayed silent-ish for 30 secs. I'd say 50% of the calls I got were mobiles in pockets.
While there were dubious 999s along the vein of 'I haven't got enough cheese on my pizza' with my fav. being 'They've got me in a body bag', you got 2 or 3 of these day if you were lucky, compared to perhaps 30+ silent mobiles. If you forced everyone to use clamshells and installed machineguns in the roof of payphones when kids on their way home from school wanted to call Santa, 999 numbers would halve.