We've long collected examples of cellotaphs and ghostbikes - those popular floral tributes to the fallen that populate so many streets here in the UK and in the US.
I think they're particularly interesting social and cultural phenomena because they are examples of public-created art and monumental social artefacts (rather than stuff created by and for the great and the good for private consumption).
Today reveals an interesting problem: how long should a ghostbike be allowed to hang about?
Should it be a temporary monument? Should it be a permanent feature? Should they even be regulated? I've got my views but what do you think?