kerrypolka doesn't just hate Hagrid.
You could do it by book! "SS/PS Sirius: Nice motorcycle, ASSHOLE. CoS Sirius: Way to be a DEADBEAT GODFATHER who couldn't even say 'Hey, how 'bout some Veritaserum action so I can SAVE MY GODSON from his HORRIBLE LIFE?' PoA Sirius: Hey, I liked that part where you explained everything to Harry and didn't fuck him up any more than he already is. OH WAIT. THAT WAS REMUS. GoF Sirius: 'Wah wah passive-aggressive caves and unnnnngh, I'm so hungry!' Shut up before I cut you. OotP Sirius: WHERE DO I BEGIN?"
I think it's the "OH, WAIT. THAT WAS REMUS" that really gets me.