I think it's mostly just a privacy issue. The idea that your every movement is being recorded by the government is Orwellian, especially when they try to hide its existence, lie about its capabilities, and you have no say in the matter (referencing NSA metadata monitoring). The average person thinks their ring camera is like their coffee maker, an individual piece of technology they own and control. If it were released that everyone's ring cameras were being fed into some NSA program running facial recognition to track citizens movement I'm sure they would be upset about that too.