Way back when, hidden cameras were the province of pervert voyeurs and Allen Funt (search engine Candid Camera). Nowadays totalitarians are putting them everywhere. From Dr. Joseph Mercola at theburningplatform.com:

Story at-a-glance
- Hikvision began as an entity of China, and its largest shareholder remains the state-owned China Electronics Technology Group Corporation (CETC), a defense-industrial firm
- Hikvision receives generous support from China’s Communist leaders, allowing the company to offer low prices and expand abroad rapidly, outpacing much of its competition
- Hikvision cameras are used to surveil prisoners in “re-education” camps in China’s Xinjiang region, raising significant human rights concerns
- In the U.S., federal agencies were ordered by Congress to remove Hikvision cameras by August 2019 due to national security concerns