The problem with all of this sort of stuff is that after a while people will 'filter it out', as they do with most things which form part of a regular routine. This is why the DRA doesn't always stop SPADS, nor the AWS; it just becomes so routine that the meaning behind it doesn't register. These signs will perhaps have a short-term benefit, but in the end the incidents will still occur regardless. As far as station calls are concerned, there are quite often diagramming issues at play. Some services have such erratic stopping patterns that it is no wonder Drivers sometimes get it wrong. Rather than simple 'fast' and 'slow' services, there now seem on some routes to be a multitude of mix and match arrangements, which surely can only confuse things for both staff and passengers?!
I completely agree that there are too many of these spurious signs appearing all over the place now. As a Guard rather than a Driver they don't cause me any nuisance, but it is a concern to see. Signs here there and everywhere are really the last thing you need when trying to concentrate I'm sure, particularly when most of them seem to have been 'made up' by individual TOCs. We have signs telling Drivers to check signals, set the DRA, release the doors on the correct side, and now some more telling them where to stop. What next?!