While this is awful when it happens and usually parents would be apologetic...I've never really felt that they should be! I mean, it's not like they told the child to do it or somehow made it happen. I had a child have an explosion last week like htat...he hadn't removed any clothing, but it leaked out and got all over everything. I cleaned him off in the tub and put everything including the sheet from the playpen in a bag for his parents. It was just easier to keep all the poop together rather than having me wash the sheet and them wash the rest.