They have from some instances with questionable content but not many others without questionable content. The question is do you persecute someone because you think you would be badly affected if they commit a crime in the future, even though they haven’t so far and doesn’t seem to be on the path to either?
I mean if you’re going fast enough with a pointy train, you could chop up people pretty easy. You just need to make sure that each person is a tire width apart to make sure the wheels don’t lose traction. Assuming a person is roughly half a metre across and a tire is 75cm in diameter, we get 1.25m per person, so a track of 1250km for a million people. Not very long at all.