Unbelievable seriously, we can't start segregating all autistic people from society, this type of mentality is madness, these are human beings, if we start thinking like this then we may as well ban all people from driving becuase of the amount of children that get killed in car crashes every year, it's ridiculous, we are living in a unpredictable world, sometimes unfortunate incidents like this just happen and nobody is really to blame, with all accidents you can look back and say "oh but what if", but the only way you could have stopped it was to go back in time with the memory of the after thought, the only thing you can do now is make sure that careers/parents are more aware of these kinds of situations and to be more vigilant in the future, these incidents are very very rare, to restrict so many peoples innocent lives over it would be unfair.
We can't start placing sanctions on all people that we feel are unpredictable but haven't got a history of this type of behaviour, we as human beings are all pretty much unpredictable, there are more children assaulted/killed by what we thought to be 'normal' people in one day compared to a years worth of assaults by the mentally ill.