People worry about their own privacy, but they should worry about the protection of people engaged in politics - not (only) political activists but (also) "professional" politicians.

These data is an absolutely fabulous weapon to ruin the public credibility of, say, a competitor for the next poll. Or you can use them for blackmail. If you can't blackmail your opponent directly you can always look at what their family members are doing.

The possibilities are so numerous that it's hilarious. The irony is that the MPs who vote those laws seem not to be aware they are shooting themselves in the foot.

Privacy is a human right. Before given up on it, you have to make sure that a) it is temporary and b) the benefits are real (is it an effective way of preventing something bad etc.)