Reader feedback mechanism

I worry about people gaming the survey. It's easier to measure editor responses and protect us from sockpuppets and canvassing. But with readers, it's far easier to mount a campaign somewhere and just have a bunch of IP addresses add their input. Maybe it wouldn't be an issue on articles about classical music. But for political issues, or religious issues, or for promotion... you could see a whole mass of people trying to push the quantity and quality of content towards that.