We were the Cuba delegation, and we had one screwball in our group who decided it would be funny to take toy guns into the assembly in his briefcase and then pull them out during the meeting. Everybody knew they were fake and nobody freaked out (this was the 80s), but the chair did cite a rule that no guns were allowed and booted us out of the meeting.

People would lose their freaking minds if a student pulled a stupid stunt like that nowadays.