True, but that's not the only party which can use this. The people themselves can use it to build better coalitions and to hold representatives accountable for acting against their will.
Expecting people to share their political leanings with any stranger who asks without encouraging them to make a friend/foe determination beforehand seems like it opens the playing field to interference just as well as it does to good faith feedback. Surely we can find a way to bias this interaction in the right direction somehow.
When I try to imagine the ideal case, it comes to me from somebody I know personally and see face-to-face regularly. Somebody who knows and trusts the candidate (perhaps transitively, for a hop or two). Somebody who wouldn't do the same at the behest of some billionaire looking to protect some shady project of theirs that's unfolding in my region.
Like, the information should flow back to leadership along a social graph that resembles the structure of the coalition we're building together. If not exactly peer to peer, from a transport perspective, then at least in a way that is authenticated by the presence of those peers.
I figure the tools of the successful revolutionary become the tools of the new government, so whatever it is it's gotta be useful for a small minority that wants to coordinate in the face of a sophisticated adversary, and then once it grows up it's gotta be useful for carrying out the bureaucratic business of a government. Unless it survives that transition with its trustworthiness intact, it won't be seen by the masses as trustworthy enough for the job. People just aren't that keen on trusting computers on the say-so of nerds like us, they need to see it succeed under stress.
So for starters I imagine an ocean of Sybil identities controlled by an enemy. Some of these will be trying to get info about your intentions so they can interfere (polling of one kind). Also you'll need to coordinate with comrades without making your entire trust graph known to all parties (polling of the other kind).
It'll never get to the point where coalitions are large if it doesn't function well when they're small, and at that phase you gotta be choosy about who you share info with because you're not yet a government but rather a threat to the existing one.