Panhandling is just asking for money. Every celebrity, politician, school, charity, church, library, little league sports team, etc I can think of has done that at one point or another. I have worked in office environments where people have come around looking for donations for this thing or that.

How are you defining panhandling and why would it be any different than other forms of soliciting for donations? Because it sounds like your question is about policing a group of people and not an action.