 Flash Crowd

"Flash Crowd" is a 1973 English-language novella by science fiction author Larry Niven, one of a series about the social consequence of inventing an instant, practically free transfer booth.One consequence not foreseen by the builders of the system was that with the almost immediate reporting of newsworthy events, tens of thousands of people worldwide — along with criminals — would teleport to the scene of anything interesting, thus creating disorder and confusion.