Good thread.

I was delayed 2.5 hours on the KLM flight from AMS-ATL once because some genius flushed a diaper down the toilet while we were boarding. Apparently it created so much pressure that it blew a seal somewhere and the plane was leaking fluid onto the ramp. They had to find some special fitting to fix it. Missed my connection home by 20 min and ended up staying in ATL for the night.

All because somebody couldn't read the 3rd grade picture in the lav.