Is “Don’t do it” a valid answer?
You come across this all the time.
OP: How do I do x
Answer: You shouldn't be doing x
This example is expressed very politely, but often you see half a dozen replies saying frantically, "You should NEVER be doing that." 
Should we not give questioners the benefit of the doubt, that they really have a legitamite need to solve the problem as they expressed it?