[fishguy]

my guess is that it depends on the group you run with.

I race with three different clubs, and none will let you out with a 4 point set-up.
i dont think NASA HPDE or SCCA PDX will allow you to go out with a 4 point unless it the ASM harness from schroth.

there is one group here locally that will probobly let you out, but thats only because they dont tech the cars(self tech), or really even have much of a track crew to flag for you.

I would be concerned about what other things are being ingnored as far as safety goes that you are not aware of with clubs like this. sooner or later, someone will find out.
I did a few events with the self tech club, and when you looked around at what was going on, it was pretty scary. my experience from it has been that if the club is not being proactive with checking out the cars going out on track, then they are probobly not a very safe group to run with.
its like they say about restaraunts, if the bathroom is filthy, the kitchen is most likely also disgusting.............you only eat there because its cheap, or you have yet to see the kitchen.