The law currently allows people, including those with criminal records, to set up a parking enforcement company. They can then legally gain access to motorists' private information at the DVLA, for a small fee.
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The law allows the DVLA to disclose vehicle keeper information to those who can demonstrate a ‘reasonable cause’ for requiring it. Reasonable cause is not defined in the legislation but the Government’s policy is that it should relate to the vehicle or its use, following incidents where there may be liability on the part of the driver. Guidance on what constitutes reasonable cause is published online at https://www.gov.uk/browse/driving/vehicle-and-driver-information.
The law should be changed to stop this from happening.