According to Osho, there is no spiritual utility in hanging a master's picture around a disciple’s neck; it is his own eccentric, purposeless device. Its pointlessness is the point: to make you look foolish in the world so you appear ridiculous. Through such ridicule, your clinging to respectability loosens and you taste freedom from roles, purposes, and borrowed traditions.
He does it for no real reason except to help you get okay with looking silly, so you stop clinging to being ‘respectable.’