You refer to "crying wolf", I refer to "once bitten, twice shy" I have seen the very phenomena I refer to in a product that I was asked to "have a loook at".

Who is not aware of consequences of what s/he is doing
I have formulated the following: "If what you do may have consequences because of changes in a totally different area of the code do not do it, it will eventually happen".

Experience, my dear Watson.

Erik