You're calling it private, but the whole debate is whether it should be private or public (currently it's public). You can't have a democracy if people don't know how to engage in it.

So partisan campaigners should be able to do traffic analysis on people to better direct their activities?

Campaigners should be able to identify who is an occasional voter in order to give those folks voting information.

You mean like this?

https://freebeacon.com/politics/dems-warn-multiple-states-we...

These records need to be made private pronto. There is no public good served by enabling pressure and guilt campaigns.

I believe voting is a public good.