I can see why people would want photographs taken, although it's not something I would ever consider.
However, at my Uncle J's funeral (a cremation) his son posed his children, then aged 4 & 7 in front of the coffin and told them to smile!
I thought it was a bit weird!
He also asked the Crematorium staff if he and the children could go with them to actually see the coffin 'burned'. Thank goodness they said "no", as that was a seriously warped idea!
He's always been a bit 'odd' though, in fact we don't speak anymore, due to his strange behaviour and comments when my DM died.