WABC-TV, ABC-7 in New York, NY, 5/11/15:
Police, MTA look for teens videotaping escalating subway stunt war
A group of teenagers is pulling dangerous stunts on New York City subways, apparently recording them in an effort to one up each other.
The new group calls themselves the "subway conquestors," and their antics are the latest in a string of pranks that include explosions on the tracks and breaking in a control room.