Sir, I'm sorry that life has you so beaten down; I can tell you're having hard times. But I promise that, when I refuse to give you money from my case while I'm working, standing in front of me mumbling about how it's "not fair", repeatedly, will not make me give you money.
Catch me when I'm not working, and odds are I'll find a dollar for you, but not while I'm actively trying to get people to give ME money.
And I'm sorry that you don't have a place to shower (I truly am; that has to be awful), but if I have to hold my breath because you won't go away, you're affecting my quality of life. And won't get a dollar.