Only because idiots don't bother obey basic railroad safety, you know how often "Florida man" is a headline in the news. One man tried to cross the tracks where there wasn't any crossing gates and people in their cars tried to drive across the grade crossing while the gates were lowering. You can't blame that on the trains, trains don't drive off the tracks and run over people, if you get hit by a train, it's your fault for ignoring basic railroad safety. And besides lots of accidents happen with cars, does that mean cars should be banned? No, people just need to be more careful driving.