Cameras, plugs and actually correct engineering choices
Several months back, BART replaced all the cameras in Embarcadero station. I have no idea why — there were tons of cameras in that station already. “Replaced” isn’t the right word, of course, because they didn’t remove the old ones, just installed dozens more, often pointing at the same things. At a guess, the new ones don’t work yet and they won’t remove the old ones until that’s corrected. Or, knowing BART’s ability to do technological upgrades, the new ones will never work properly, so they’ll all stay up, gathering dust and grime and preventing no crime or disorder at all. At a wild guess, the only reasons Embarcadero is so richly endowed with cameras are (a) it’s full of tourists getting their pockets picked, and (b) part of the station is underneath the Federal Reserve Bank, engendering a sort of mutually reinforcing bureaucratic paranoia.