I feel like I must have been 10 and pretended I was a child who wanted to join the jehovah witnesses without my parents consent. It was super interesting and in the end, I said I did not went to do telemarketing for my God door to door and asked them why they did it. 

Another cool prank , way older, about 12, was to pretend I was a tv survey about consumer preferences in choices of reality tv about celebrities. I remember one woman always watched those shows and in the end, we both concluded they were the worst. 

These are the mastery of prank calls I gathered by 6 when I spoke to gansgters at the itlaian pizzeria about steve and my phone number. I asked them if they had ever delivered at steve's place. The pizza we got that night was nasty.