You should not collect money in devious ways even for good causes. Help should come from pious hearts, from well earned money, from persons who know and appreciate the purpose, for which they give. Let each one give out of the fullness of his heart, on his own initiative, whatever he can give gladly, after studying well the cause. Your duty is only to inform, not persuade; begging, for the sake of work which is inherently good, is an insult, to human nature; the man who asks and the man who is asked, both are demeaned.
(From : Sai Veda, The Word of God, sayings of Bhagavan Sri Sathya Sai Baba)