I don't plan on using the toilet when I board a plane, I just use it in a emergency, like before I wet myself and my seatmate.
I certainly don't carry change in my pocket due to the extra time it takes to negotiate security (remembering that it's in my pocket). So if I really need to have the proper change in an emergency then you can expect that there is going to be a messy plane at the end of the flight.
I'm afarid that Mr O'leary has turned over the lamp again and set fire to his own house.
No amount of back peddaling will get him and his airline out of this.