What next from the airlines....pay toilets ?

It hasn't happened yet, but "pay as you go" toilets can't be far behind what is happening now at Delta Airlines.

If pay toilets do catch on (and if they take credit cards) the charge on your next statement might read:
"Delta Waste Management (New York to Miami) (charge based on mileage)

You think that's impersonal? Try this on for "size".

worldnews(dot)nbcnews(dot)com/_news/2013/04/02/17575049-samoa-airline-to-price-tickets-by-passenger-weight?lite

Samoa airline to price tickets by passenger weight

Most airlines charge by size. For example, with Southwest, if you can't fit in a regular sized seat, they charge you for 2. I think pay toilets are coming soon. I also think it'd be great if they actually charge you for fresh air. Something like, if another passenger farts in their seat, it won't file through the forced air system and blow fart air in your face. 

actually it has happenned about two years ago ryan air out of ireland started charging for toilets i believe it cost a pound coin which is probably about $1.50 at todays rates. personally i think its stupid and a bad pr move but they are known for doing super low cost flights between european countries but everything is an addon.

also a samoan airline just started charging passengers by their weight