One of the issues with junk calls is that the enforcement is by ICO who seem rather ineffective at discouraging junk calls.
There is one other measure in the legislation - people who are the victim of junk calls (when registered in the TPS) can sue for damages in the county court. But what is the damage for one junk call or even a couple from the same caller. Bugger all. So it is (a) nor worth sending a bill or suing, and (b) likely to be hard to justify any damages you do sue for if it goes to court.
What I think would be effective is if thousands of victims of junk callers were able to do something worthwhile against the junk callers - death by a thousand cuts.
So I have made a proposal and put it in to an ePetition - please sign if you agree.
Amend The Privacy and Electronic Communications (EC Directive) Regulations 2003 adding a new clause:-
"30(4) Where such procedings make a claim for damages not exceeding £50 the claimant will not be required to justify the value of the claim, only that they have suffered some damages, inclding mere inconvenience, as a result of a breach."
Doing this will allow anyone suffering junk calls to invoice the caller, and then pursue a county court claim, for £50. The callers will have to settle without court as they know they would lose, so no burden on the courts.
I feel that thousands of victims of junk calls invoicing £50 would be very effective, as well as satisfying for the victim.
Update: Don't forget that this would have the same effect for junk emails as well.