1. Silver has enforcement the ban/del at Chiino, also his screens about illegal trade were fake, so it cannot be considered as Chiino/he was the one who tried to do the illegal trade. That was hardcore scam, still scam. That's banable. If you got more proofs against Silver he might be deleted.
2. About Shigella... Yeah, indeed Staff impersonation is punished with permanent ban (deletion). That whole scam is confusing, so it was just "better" to do less than make another "mistake". So now he's deleted.