i can understand where people come from with this as i was dealing with outbound calling and complaints regarding this change but i guess this is the bottom line when it comes to t&c's:
9 Changes to the Agreement
9.1 We may change this Agreement and the Charges at any time.Changes will be posted on our website
www.o2.co.uk.Please check this regularly for
updates.
9.2 If we increase the Charges for the elements of the Service you are using or change the terms and conditions of this Agreement to your significant
disadvantage (in our reasonable opinion)we will give you 30 days'notice in writing before the changes take place.We will notify you as detailed in
paragraph 7 above or we may notify you by text (SMS)to your Mobile Phone number and/or by email where you have supplied your email address to us
for this purpose.
+
4.2 From time to time we may have to migrate your Account from one billing platform to another.In these circumstances we will notify you if migration of
your Account will affect the Service in any way.
So i guess once its signed you may not be happy with it but in the end you have signed a contract in whcih you have agreed to these terms