In my university, students are not allowed to smoke and wear slippers in the campus.
The funny thing here is, starting last year, you can actually see people smoking eveywhere, even outside of the class. The guards and workers just can't control the big numbers of students smoking in the campus. And this year, they gave up lol. So now our place becomes the only university in the country where students can smoke.......despite all the no-smoking sign board. I don't smoke tho
And about slippers......more than half of the students here wear slippers to class, including me :p Lucky they don't really stress on that rules. Even the teachers don't seem to care about it