Normally I would condemn vandalism outright, and to be fair, this does somewhat endanger people, but frankly sometimes you have to give a round of applause:
If you can't quite see it (or read german):

If you can't quite see it (or read german):
ENGLISH (approximately): Anonymous graffiti artists used paint to turn a train door into a window, and a train window into a double door, including the rubber doorjambs and touch buttons. the whole thing was so realistic, the conductor had to put "door not in use" signs on the window so people wouldn't try to walk through it.