I totally agree with Lucy that masturbation in public is unacceptable in a civilized society. Persons doing this activity need awareness medically,socially and educationally. We should find the reason why the person is doing this. Is he sexually-starved or unexpectedly sexually-active? Click the link below to read more about this sickness.
http://lucysmilesaway.com/2015/03/15/staying_safe_in_india/#comment-8079