You're missing the bigger picture here babe.Killing a black man lying handcuffed on the floor with 3 policemen on top of him is to me more severe than tagging a train. Tagging a train is a problem of a minor kind. But if you think a black life is not worth much it can be for you a crime with the same gravity.
The train can be cleaned; resuscitating a human is a bit more difficult.
Believe me you will be more safe on that train than if you, supposing you would be black, would just walk on the street in the US. There have never been any deadly accidents due to tagging of trains, there are almost every week dead black innocent people due to police action.
How can someone tag that train and not get caught and shut down? Dude, if they can do that, a bad actor.... (we don't give a f about graffiti here)..... a for real bad actor could get access to that bitch. Put 2 and 2 together. Catch the spirit of the post, and then use your brain. Not trying to be a dick, I'm just sayin'. It has nothing to do with graffiti.