How much would explicit accurate platform signage ruin the tube network?
If you were to go to every platform, or every station, and put up a sign that explicitly stated where exactly on every platform to stand, to board the tube, to be exactly where you will want to exit for each and every station and connection, how much of a negative impact do you think that would have on the Tube network?
With stations like Victoria and Tottenham Court Road, that send those going into the station on a far longer, in-direct route to the platforms (in order to increase the capacity of passengers that a station can hold), over how short and direct the journey is to get them off the platform and out of the station.
People do already stand on the platforms for where they want to get off, but many don't. However I believe they are very likely to do so should they see a sign directing them.
Do you think such signage would cripple the network with overcrowding and the like (station staff already struggle to get people to just move down the plaform when it's busy; let alone if the signage was telling them that this is where they should be standing) until it was taken down?