"Well they could always tie rocks to your legs and chuck you into the ocean," Sirius pointed out, tone aloof. He mightn't mind helping with the execution of such an idea. Bellatrix and Tom Riddle could both say hello to the bottom of the ocean floor.
"Majority rules and all that. You're outnumbered and even if you don't want to lark around the island being friends, you'll know what it's like to be a social pariah," he told her, not feeling the barest hint of pity.