Bring in the law that makes proper damage model mandatory and they will slow down when they learn that hitting anything at 40kph is really not a thing you can get away without a scratch.
I hate these kind of studies as sheeps are thinking now racing games are bad, LFS is racing game it is bad.
But surely those school shootings are stupid thing, games surely are not making them to do that, at most they will get some ideas, but they can get it from tv or movies or then they just make up ideas themselves, but anyway reason why some person does such thing is not because of game, bad parents, society valuing too much of productivity and general consuming madness come to mind first, then there are real deceases that can make people do weird things, drugs, etc.
I can't get it why we don't already have 3 day work week as we have so much technology that we can do quite many times of work compared to 60's for example, yet still we are pushed to work even harder, really don't understand where all that gain from work really goes?