3 things for you to think about...
Firstly, stop writing as though you are a spokesman for all trackday instructors - you certainly don't speak for me.
Secondly, be brave and stop hiding behind an alias and tell us who you are.
And thirdly, why should I be able to claim compo if I knew the risks ? 
A bus driver know`s he could have a crash don`t mean if a car rams him he says "well I knew it could happen". It depends on what you were doing when you crashed, Its mentioned in briefings that the instructors are not to be used as a target so if tdo`s know we can be used like that why do we not have some kind of insurance cover, I have to have it for all the people that work for me.
I`ve never written like I am a spokesman for all instructors, when I 1st looked on here there were a few that were giving fe instructors a slating.
I can`t understand why you as an inst for fe would not want to say something when we were so generalised,
I`ll be quite happy to intrduce myself next time we meet, If by "be brave" you mean I`m a coward then we can discuss that too.