Ring ditur people

Can ring when its senses motion deter criminals by saying can we help you or private property no trespassing or smile you’re on camera so it deters criminals

Not currently.
There are signs that say that, that you can purchase to put up. But truthfully, at least in my town due to the lack of prosecution of property crimes the criminals don’t care what you have as a deterrent as they know the odds are in their favor they’ll never get caught, cameras or no cameras.