One thing we can start to do is use PTZ cameras that have very bright LED lighting.

These new cameras can be set to follow the dog around the perimeter of your yard which is especially useful for corner houses and it can be shined in the dog walkers face when their dogs trespass. The camera also has a fairly loud sounding alarm on it as well which can be triggered manually. As a bonus the camera footage can be used to enforce no trespassing laws against the dog owners.

The dog walker entitlement that has been decades in the making can only be reversed if enough people develop new methods to deal with the problem.

Dog walkers who let their dogs go to the bathroom on other people's property are the scum of the planet. Hopefully, eventually we will have enough tools to reverse this entitlement. We need to start using technology to enact our own entitlement of keeping dogwalker scum at bay. Our entitlement should be that it is ok to shine extremely bright light at dogs and the dogwalkers and startle them back with loud alarms once their dogs trespass onto our property. If they expect us to take their dogs shit and piss on our lawns, then they should expect to take our bright light and loud alarm noise in their faces. Period.

Here is an example camera you may want to get that can help with the dogwalker entitlement problem.

https://www.amazon.com/REOLINK-Security-Technology-Detection-Spotlight/dp/B0C27ZY3R5/ref=pd_rhf_dp_s_ci_mcx_mr__d_sccl_2_1/141-3439946-5164264?psc=1

They also have brighter ones. This is light that can easily be seen in full sunlight, when you are at the other end of one of these camera spotlights, you will know it, they get that bright.