FWIW, I rode some with a young dude pedaling from CA to FL who had food stamps(don't know how.) He survived in many of the same ways the OP(troll?) has proposed, including a bit of charity from me. It certainly can be done. Will he learn anything that will turn him into a productive citizen? I doubt it. But likely no harm done.
Touring cyclists tend to get whatever assistance they need from trail angels. Makes the angel feel good and keeps the cyclist moving along. Win-win.