[benbristow]

Another reason could be due to smokers. There's a reason toilets on airplanes still legally need to have an ashtray - there's still people who are willing to break the rules to have a fix so it's safer to at least provide somewhere safe to put a cigarette out.

Charging for the toilet could just encourage those same people to light-up in the main cabin.

[manarth]

Surely the premise for "smoking in the toilet" is the possibility of not getting caught (hence dedicated detectors in most airplane toilets).

Smoking in the main cabin would make them much more easier to identify, stop, and convict, no?

[benbristow]

True. Addiction works in mysterious ways though.