That first one reduces your privacy even further: not only does Group A track you, but now everyone knows that Group A is tracking you, allowing Group B to ask Group A for data on you.
But now I know group b is tracking me too. Basically we have lost our privacy and we need some way of knowing who has what on us. Total transparency is the only answer - otherwise people can track me and it will never come to light - so punitive data protection measures will not work cos there is no obligation to report.
