10 Ways to Annoy Sirius Black
As requested. My favourite is number 6
Whenever someone asks, "Are you serious?" Laugh loudly and point at him.
Constantly question him of his days in Azkaban. Ask him stupid things like, "Did they let you eat cake?" and "How often did they wash your underwear?"
Stand up on a table during Order meetings and yell, "Sirius Black: Escaped Azkaban, Eluded hundreds of Dementors. Killed by drapery."
Unleash Weasley's Wizarding Wheezes pranks on him whenever you feel the urge to.
Make sure you tell him how great Peter is, and how much cooler 'Wormtail' sounds than 'Padfoot'. Do this daily.
Wake him up at four in the morning to give him a pamphlet for 'Sex Addicts Anonymous'. And then say, "Well… since you're up…" before giving him every detail about your dream the previous night, including the time where you dreamt he turned into a girl.
Put a large stuffed dog in his bedroom.
Buy him a flea collar, leash and a squeaky dog toy.
Randomly yell, "Sit!" at him and act as though you're trying to teach him something. Be persistent, don't give up.
Hit on the portrait of his mother. Make sure he sees you. As you walk away, loudly hum, "Siri's mum has got it going on! She's all I want, and I've waited for soo long!"