GC:
Don't take this the wrong way old boy, but I'd wager you've made a damn site more mistakes than that; we all have - what matters is that we learn from them.
Yes, I have seen things that it my opinion are fairly horrendous examples of 'airmanship', and...
Yes, I'd agree that being non-comms into a busy fly-in, when a suitable frequency is published and the aircraft suitably equipped, would definately qualify as such.
However, name-calling here, or the kind of angry chest-poking I've seen at certain puddlejumper establishments are NOT the best way to get someone to think about their flying in a reasonable manner, and therefore hardly likely to make them actually change their ways. Or is that not your aim here?