Smoking out of a bong is not illegal if it's loaded with tobacco, but that doesn't mean cops won't stop and harass you if they see you smoking one out on the streets.
A new prank is becoming a huge problem for law enforcement. As a person that loves pranks, this is the dumbest thing anyone could ever do. Don't do it!
I can tell you first hand that college professors absolutely hate cell phones. Most of the time they just tell you to put them away, but others aren't as nice.
If you haven't realized it yet, today is April Fools. Hopefully you haven't been pranked too much yet, but if you have and are looking for a little payback, well you've come to the right place.