Well good idea, except for those who are afraid of thunderstorms are now forced to use their residential toilets.And also, it would be quite tricky to time the exact "poop" with the actual thunder. If you do it as soon as you hear the thunder and then the thunder stops before you're done.... embarrassing.
Why not just play even louder pre recorded pooping noises? At random intervals, coming from different stalls..
Three words:Noise Cancelling Toilets
Well I was thinking if it was random thunder noises it would not cover all of them, but hopefully you wouldnt also be able to tell what was thunder and what was explosive diarrhea.
probably cause some sort of law suit bull