Hmmm. I am one of the last people among my friends to have a cell phone and I never asked them, not even once to use theirs. Now that I have had one for about 8 years, I can honestly say that no one has ever asked me to use it. Nor has any stranger ever come up to me and asked for money or food.
I have no idea where you live, but it seems to me that you should move away from there.
I suppose people who ask for things do so because they don't have those things and want them.