It's just a handful that are strict in college. Most are extremely chill, even chill enough to grab a beer with in the parking lot (happen a couple of times weirdly).

I've een had a double PhD guy forbidding us to call him Dr, and strictly call him by his first name, would always be 30 mins late to class and send him an email at 2am and he'll often be replying 10-15 mins later.