To be honest I don’t have much to write because I couldn’t find much information anywhere; most websites post their images (invariably taken from the biggest such collection which is posted on imgur) and some comment on the pranksters’ humor: they are a series of fake message stickers created in the format used by the London underground subway to communicate with its passengers. And I have to concur –most of them are indeed very funny.
I believe though that the anonymous creators of these signs had something more in mind than bringing a smile to the lips of the tired Londoners commuting the same lines every day. The messages themselves (“We apologize that all apologies for the chronic overcrowding on this train are shallow and meaningless” “No smiling –penalty £200” etc.), show that they intend for a deeper social commentary through guerilla warfare: at first passengers will probably ignore the text thinking it is one more message like the ones they see everywhere and suddenly they will realize that something is wrong. And they will wake up –literally and metaphorically- even for a few seconds.