WE just have very different opinions that's all, I will bet that you will most likely change your mind in the future.
..and by the way, track riding red group, is probably the group you have to worry about the least
Actually, thinking back. I did have one experience that, if it had gone the other way, may have had me thinking more like you. Main straight at TMP, yellow group, guy on a GSXR squeaks by me, slots in *directly in front of me* then grabs a huge handful of brake for T1, a good 100 ft before I would normally be braking. That could have made me a believer in brake guards pretty quick, I guess. As it turns out I was able to avoid him but I am sure I had the rear wheel in the air. So I guess it is not really true that I have never come close to making contact - I had forgotten about that one.
Point is, that stuff should not be happening in intermediate group. People need to calm the F down and only make passes when they can do so safely.
Coincindentally (or not), that guy's buddy also tried to collect me on the same day. He straightlined 6, trying to pass me on the brakes. Went right on through, back wheel hopping and chirping like crazy, no attempt to turn in at all. Fortunately I saw what was happening and just rolled off and let him pass in front of me off into the grass - no problem, not even a moment of adrenaline. He came later to apologize but his friend who I nearly ***-packed on the straight was oblivious that he had done anything wrong.
The best safety measure is to just keep your nose clean, leave lots of space, avoid riders who seem overly aggressive, and report the real d!ckheads to the marshals. In novice and intermediate group you shouldn't even be inconveniencing others during a pass, much less endangering them.
More to the point...I have *never* witnessed or even heard about an accident at a track day that would have been prevented by safety wiring the bike, with the exception of oil plugs coming out (seen that twice - nasty).