If one takes the view that one is doing someone a favor, and are thus owed thanks by reason of on'es personal expectations of others' manners, then yes, one will be disappointed-- and often.

If, on the other hand, one takes the view that by fulfilling a request one is adding lyrics to the fabulous store of songs someone may find here-- possibly oneself, or a fellow or potential member-- then no song search is a waste of time.

~Susan