As an "old warhorse," I can tell you that I have been labeled a "complainer," because of such "complaints" as "Have you considered what happens when the user does X?" or "I tried pretty much the same thing, last year. It didn't turn out the way I wanted. Here's what happened..." or "Is that thread-safe?" or "Are you sure that will never be called on another thread? You do have a few network closures, here." or "Did you make sure that you let the connection go, after sending that instruction? It will result in power drain, if not."

etc.

Real killjoy.