There is a lot I am unsure about but I'm sure about this: zero tolerance does not work.

Read more about it on the web. Zero tolerance is something management / administration created to not have to do their job. The world is nuanced and each case has to be judged on its own merit. I do not support slapping a zero tolerance "policy" (not really a policy, more like a copout).

> Cameras - everywhere - except individual, single occupancy enforced, stalls.

Will you place an actual human outside each such stall to guarantee there is ever only one person inside?