A campaign volunteer asked me to upload my contacts and called it organizing people I already know

I attended a volunteer orientation for a campaign I am considering helping. Near the end, the organizer asked everyone to install an app and upload their phone contacts. The idea was to identify people we already knew and send them personalized voting reminders.

I understand why campaigns value conversations between friends more than messages from strangers. What stopped me was that the people in my address book had not agreed to become campaign data. Some are coworkers, former clients, relatives, contractors, and people whose numbers I saved for one practical reason years ago. My relationship with them does not automatically include permission to submit their information to a political organization.

The organizer said the app would match contacts securely and that volunteers could choose whom to message. I had no basis to evaluate that statement during a five-minute demonstration. I wanted to know what fields were uploaded, whether unmatched contacts were retained, who could access the information, how long it stayed, and whether deletion was possible. The privacy link was available, but we were being encouraged to tap "allow" before reading it.

I declined and offered to contact a few friends manually without uploading an address book. The organizer said that would be less efficient and make tracking difficult. That may be true. Efficiency for the campaign is not the only interest involved.

I am not accusing the app of misuse. I am saying I cannot grant access on behalf of everyone whose number happens to be on my phone. If I volunteer, I would rather work from a campaign-provided list or use a method that lets me invite someone without transferring my whole network.

Is refusing contact upload an excessive privacy stance, or a reasonable default? What questions should volunteers answer before turning personal relationships into campaign infrastructure?