I'm glad you didn't lose any more than your time...and hopefully the information wasn't used against you in anyway.
Interesting... while I am sure there is a reason behind it, I can't think of any beyond what you have suggested....and totally plausible to be any of them.
Thank you for being you.
PS...I had a chuckle about the random events happening in your lecture theater.
Took me back to one of my first lectures - somebody had obviously spent wayyyy too much time at the tavern, came in, yelled at us all, tripped down the stairs and then vomited everywhere.
Welcome to Uni hahah.. I wonder if they remember doing it?!