Piltdown Man,
Bit condescending isn't it? Twice in the last few years I've watched a/c taxi straight past the stand they're supposed to be parking on... (B744 at LGW, A319 at LHR)
Obviously, YOU'VE never made a mistake in your life,
but for the rest of the mere mortals out there, surely every bit of help is appreciated?
Further, you can't see behind you, so how would you know to stop and shut down immediatley should something occur aft of the flight deck windows, without a marshaller / STOP signal from the stand guidance?