Re: Most people realise
"That accounts for 100% of the cases of dropping a phone in a toilet that I'm aware of"
I've heard of a few where it dropped out of a front pocket, but the funniest was a friend who had one of the Nokia phones with a waterproof case (can't remember the model, but the case split in half between screen and keypad). He found it easier to text with the case removed. You can see where this is going: texting while sat on the loo, case removed, slip, plop.
As for the iPhone issue, many people do keep their phone in their back pocket. If that's what they are used to, and it has never damaged their phone before, they are going to be peeved if they find their brand new, overpriced expensive device has bent under what they take to be normal use.