Grandview police are pretty good and one of the facets that make Grandview a very nice community in which to live. Last summer I could not sleep and was out walking around 3am. The GHPD drove by me and then circled the block passing me a few more times. Kind of letting me know they saw me. I imagine the cop was pointing two fingers at his eyes and then pointing at me, but it was too dark to know for certain.
The CPD and GHPD also actively keep panhandlers off of the Grandview Strip. On more than one occasion I have seen them 'talk' to the pioneering panhandlers and see the panhandlers leave (probably headed back to High St).
As far as DD enforcement, there are always cabs loitering near Panzera's on busy nights. Why would anyone risk so much to save $15? It is a poor bet and one you will lose someday.