@Seán - Re: Constipated types
This service is just plain WRONG.
While I don't doubt it is possible for someone to fake CLID using software or a VOIP service (I acquired a London number for Skype only because that the code for where I live did not appear to be available when I registered for SkypeIn (I've stopped using Skype now because VOIP is crap but the fact that a business is being allowed to sell a service that allows you to ring up an access server and enter any number you would like to present and offer the option to filter your voice through modification software to boot is just ridiculous.
There is a market for this type of service but it should be registered law enforcement ONLY.
Where I work the main switchboard number is presented when we dial out which is fine because at least you are phoning back a number that belongs to the organisation that will be answered and would be quite happy to have my direct number displayed along with the main number (my phonw is part of an Auto call distribution system so cant accept incoming calls that easily but at least it would give peace of mind.
I just gotta hope that some moron doesn't input my home or mobile number in at random and pester their ex-girlfriend/missus and then I end up getting the flak.