^^^ No, no, no, no and no. I think Billie and Mark, yes. But everyone else...no. I like Joey Jordison, but he doesn't fit in with the vibe of those guys.
What Andres said about the first part. But about Instagram, he has a private account as well as a public one so it's most likely he just stopped following them on the public one so he doesn't have to scroll through all their posts twice. Or some other equally mundane reason, they're grown men with more important things to worry about not petty teenagers who'd unfollow each other on a social media site because they've fallen out.