That's a slippery slope, sir, and a phony-baloney argument to boot, in my opinion.

I see so many people who are distracted evermore so by their infernal smartphone addictions while driving, than by panhandlers. And I would argue that if we go there, we then must extend such a proactive ordinance commensurately broad. Restrict all flashing LED billboard signage on roadsides, business sign-wavers on sidewalks, balloons or inflated advertising, et cetera. 

Targeting beggars on the street corners for further ostracism is such a disingenuous solution to driver attentiveness that it makes prominantly obvious the true intentions of the proponents of this trojan horse. But if we are truly serious about addressing distracted driving, the real and honest place to start is a meaningful enforcement against people  texting while driving.

We already have laws to punish distracted, irresponsible driving. Proactive prohibitions that create victimless crimes which profit government are fishy.