This is why this thread exists - NOT to scare you off, but to encourage you that this is still the best and safest way to properly experience your car with minimal risk to others, and NO cost to your licence. There are no telegraph poles to hit, no oncoming traffic, no pedestrians, and no hidden speed cameras to ping you! There are plenty of experienced people around to assist with driver training, and it's a friendly environment for all involved.
Yes, there is the risk of this happening, but once again, this is THE FIRST INCIDENT EVER TO OCCUR AT AN SAU TRACK DAY!!! And we're not in it to race, we're in it to improve our driving skills and experience our cars in a controlled environment.
Please DO NOT let this scare you off attending.
Does it still really matter? The fact is this: "racing" and a "racing incident" is a lot different to driver training at a track day.
If you're prepared to competitively enter a car into a proper race event, you do so in the knowledge that you may well share paint with fellow racers.
This, however, is a driver training day, and as such the expectation that something like this will happen is almost non-existant. We know the risk is there, obviously, but also know that the likelyhood of this happening is a lot lower than at an official racing event.