It's not just border cities. I came back from a business trip to Memphis and were shocked to see blue lights blinking on top of street light poles [0] almost everywhere specially in poorer areas, they are cameras recording audio and video 24/7 installed by the city to deter potential crime.

[0] https://www.toledoblade.com/image/2014/06/06/1140x_a10-7_cTC...