I had someone convinced that the chuckle brothers were father and son

my former friend went from being an alright kid to a young adult with not a care in the world, no job, blowing his dole on drugs, the typical scum-to-be!
he let slip to me that he stole a bike that i found sat in his shed, so i wrote him a nasty note from the "owner" saying "followed you and your mate with my bike, i know where you live, i know what you look like, leave the bike at morrisons friday at 1pm or you will get hurt"
he found the note on the thursday night through his letterbox at about half 11 and panicked, ran down to his mates that was with him at time of theft, banged on the door and got his mum out of bed and told her he'd stole the bike so his mum battered him around the head and made him take it to the police the next day, they did, but said they'd found it behind the mate's house!!
in that same week, i also faked an eviction notice letter and sent it to his flat, stamped and addressed, and he had to stay in all day waiting for the council so he could stop himself being evicted, having no idea it was just a prank, til i told him 3 weeks later!