I don't know whether automatic toilets exist in the USA.....
.......but they do in the UK. These things are a self contained metal structure, placed in the high street, and are automatically self cleaning when the user has gone. As the door closes after the person has made their exit, sprayers start up inside, making it nice and shiny for the next person. They usually cost about ten pence to use, and you put your money in a slot outside, which releases the locking mechanism on the door. Gentle music is played whilst one is in there, in order to make the crap as stress free as possible.
The only trouble is, young rascals soon worked out that, if they put ten pence in the slot and opened the door, and then slowly closed it until it appeared shut, but wasn't......the next person (no doubt desparate for a poo) would pay their money and think that THEY had released the door, go in, close the door behind them and immediately start the cubcle cleaning cycle, as it thinks that the previous user has just exited.
Passers by would hear Handels water music gently wafting from the unit, accompanied by shrieks and screams of a person trying to dodge multiple jets of foamy water...........