Lets have some considered discussion on this.
As a TT/MGP marshal with several years experience, and a strong sense of self-preservation, I would point out (and I am a friend of Hilary and her family) that the instances of marshals being injured are very very few and far between. Likewise, this is the first time spectators have been killed. Far more people die in household accidents. That does not diminsh the tragedy of what happened, but let us look at this as a complete freak accident. Many accidents with similar outcomes happen weekly on our roads, but we do not ban driving on those. Both marshals and spectators choose to be there, and are warned of the risks. Do you read a disclaimer to your passengers when you drive your car?
However, I take the points about both increased risk due to increased speed, and the changing perceptions of the general public.
On the first point, I strongly believe we should be restricting TT machinery to 600cc. This would, I think, be agreed by many riders, who find they can achieve almost the same lap times, but with less stress and risk, than on the bigger bikes. Remember all the declarations after the awful 1989 accidents... I for one, have not forgotten Mez. This also opens up the idea of other classes.. 250? two stroke? What do riders and spectators want to see happen? They are the joint lynchpins of the TT.
On the public's reaction... let's have some education, and some reasoned discussion about the balance between acceptable risk and health and safety.
I will be marshalling at the bottom of Bray Hill, as usual, at the end of August, and enjoying the diversity of machiery in the Manx Grand Prix, while lamenting the absence of sidecars (the best and most diverse class of all!!) I hope not to have to deal with any incidents, but if they happen we will be there, trained and dedicated. I do not expect to be hurt, but if I am, it will not be the fault of the MGP, but one of life's nasty little tricks.