so this place we used to go to a couple years ago had a pool, and a pool phone. i got the number for the pool phone and had some fun. i would call it and it would ring and some random person would pick up (i could see it form my hotel). and i would say stuff like "can you put freddy on? he's in the pool." i would watch people start calling out names and stuff. it was pretty funny.
i also would dial random rooms pretending to be the room service. i would tell people they need to get out of the room because i was going to clean it. ide say if they didnt get out now there room wasnt going to be cleaned and stuff. i even got someone to go to the front desk and complain (they were super poed). those were good times.
also when i was in high school, i used to call the teacher from my cell phone. everyone found it funny that the phone kept ringing. the also got mad and wrote out a referrial (but he didnt know who it was so he couldnt give it out).