Comment Redirect ongoing lecture guests to... (Score 1) 804
If it was me, I would put up a special access point in all lecture halls. Then I would make it so that when (according to the schedules) a lecture is ongoing - any clients from these access points would get redirected to a landing page: "You are browsing during a lecture, we would appreciate if you would wait until after the lecture.". Then optionally offer grace periods or ignore options.