All things we would all like to say, but, in reality it will bury you even more deeply into your hole. You feel insulted because they don't acknowledge you is really what it is. Perhaps, it makes you feel invisible at times. Everyone has pointed out good reasons, but I think Dtrain had the best solution ideally. Add one of those clocks put his name on it with "will be back at____ such and such a time"

Look at it this way, they may be just as annoyed as you for one reason or another, the very reason they are seeking the super. So repeating reasons, and rehashing might not really appeal at the time. Unfortunately, as the outsider, you just have to grin and bear it. Any ammo you give them, no pun intended, will just fuel how they perceive you!