I'm with Clip as well. Perhaps if table38 was aware of the sheer number of ridiculous personal injury claims then he/she would understand why the railways are so keen to broadcast safety messages. They are not for the benefit of passengers, they are to prevent the TOCs and Network Rail being sued.
(Of course, there are other notices where they have to display them prominently - like no smoking notices).
But as someonet that is also at the sharp end of the health and safety, I agree we are supposed to remove the hazard and provide notices if we don't but you are in a bit of a no-win situation. (Totally devils advocate)
It is raining, the monitors state be careful of the wet platform but arriving passengers don't see them as they are position for departing passengers to see (yes the also use the tannoy) but the person slips and falls as soon as they get off the train. Cue Ambulance chaser.
Still raining, be monitor is showing information about engineeering work, then safety then the train, it takes 40 seconds to get to the information about the train, the person runs to get it and slip. Cue ambulance chaser saying that if they would not have needed to run.
I work with high power components, back in the 70s you could touch these easily and die. Now they are covered. In the 70s you personally made sure you didn't touch them, now the less respect is paid to them. Sometime wrapping people in cotton wool makes things less safe (if you follow my warped logic). Is Glasgow Queen Street more dangerous than it was 20 years ago, nope, it you slipped running for a train you were an idiot back then, now it is Scotrails fault. But having notices stating the platform is wet does not help if the roof is leaking for an ambulance chaser.