I, too, voted for sabotage because it seemed the most malicious.
In one of my old jobs, tardiness was irritating, but nothing more, but in my current job, it causes havoc. We open at 9 am, and we have to be ready to take care of the flood of people waiting at the door.
I also remember a thread from a few years ago regarding socializing outside of work, and there were a few people who insisted that it was vital and mandatory. Well, not in every position, and thankfully, not in my current one.