[pwthornton]

You could do that. The cheapest and easiest option is just to get yard signs saying that you are recording 24/7. Nest, Ring, and others sell there. There are plenty of generic ones too. If you want to use video cameras as a deterrent, you need to make sure people think you actually have them.

I sometimes see people with their cameras pretty well hidden. That's not going to work as a deterrent!

[brewdad]

I use both strategies. I have an obvious camera on my porch pointed at my front door. I also have a camera hidden in a bush near the opposite side of the porch. Any potential troublemaker turning away from the obvious camera gives me a perfect view of their face from the hidden one.