I'd be more afraid of Venom. He would scare the crap out of me. I'm sure that if you ignore Juggernaut and just walk by him without looking, staring or saying a word, he'll leave you alone and not do anything to you. Venom would probably just kill you for the fun of it without any mercy. Juggernaut would see you as a whimp that's not worth wasting a punch on.