JAPP:
Personally, I feel that my rebbeim were not really less strict. They may have tolerated slightly more “shtick” than usual, but as far as drinking/smoking, they were strict. Probably particularly because a school accredited in the state which has teachers serving students alcohol was too much potential for danger and chillul Hashem for them to stomach. They wouldn’t chastise us if we came a little shikkered up, but they ALWAYS made sure we were safe and didn’t do anything stupid. I doubt any rebbe would disregard their students’ well-being.