The public aren't worthy of individual martyrdom.

Humanity are not, as a group, admirable. Humans sometimes are before the rest eat them.

Humanity is a hostile environment. Always has been.

Mastering what you own is educational fun so there's every reason to learn.

Volume is not quality. Those who object can go elsewhere.

Only destructive attacks can coerce wise choices.

Slopflooding is sabotage under guise of assistance.

Violence including war is an accepted therefore acceptable method of resolving various human problems, including social parasites like the people who sold adulterated infant formula with fatal results in China. Their public liquidation sent a healthy message some people are refuse to get when asserted by lesser means.

If some life is precious it follows other lives are the opposite.

Schools have plenty of inquiring student minds capable of studying how existing camera systems affect criminal acts, for example if and how they deter crime or improve speed and quality of security response.

Students are school customers with an obvious need to know. They could contribute useful studies from their service consumer perspective.

We cannot precisely understand real impact without valid information. Cameras in public space are not cameras in private space. Colleges could precisely compare situational impact, study relevant laws and precedents, and much more. Students could be ideal evaluators since they unlike surveillance system businesses are not selling anything.

What might student study of these systems look like? Humanity needs third party (not sellers, not criminals) investigation and neutral explanation of subjects technically and legally uninformed people cannot easily understand. Education is civilization's continuity.

They're not popular by accident. How quiet they are is up to the humans who spec their enclosures. (Ditto with large diesels which are routinely made sufficiently quiet for cruise liners.)

Industrial flue gases were traditionally exhausted by tall stacks whose draught pulled fresh air into the furnace at the base. A more recent reason that's done is to reduce ground-level pollution.

Turbines need not be run open like an engine on an outdoor test stand. That's why Air Force bases have sound suppressors to test engines in and out of airframes. Those "Hush houses" could be much quieter but are mostly located on operating air bases where other, installed engines running in afterburner for takeoff are normal.