Edit: One idea, not sure if you want to go this far. Is make a police report about the threats and in the police report explicitly deny all connections to bustabit. It's a crime to lie to the police, so it'd obviously be something that Daniel wouldn't or couldn't do. You can then send people a scanned copy of the report to show people this (and the fact that you are reporting people who make threats).
From my personal experience, even though I don't live in America, I can only say that the police here have little opportunity to stop the attacks or actually protect Justin. The attacker would have to be stupid enough to reveal his own identity for the police to intervene. But I would still report the attacks and tell the attacker exactly the same way, that would most likely have a deterrent effect and show that Justin is serious.
Removing his name here from your quota was very good and I think it is the most important way to stop the accusations completely in the future, because Justin and bustabit will no longer be found together.
P.S. If it's any consolation, I've received enough threats that I am almost offended by the lack of them now (if no one wants you dead, are you doing something important?) after selling bustabit. I've never been ultra-secretive and done things like meet players in real life and a few people have my address etc, and I'm still alive. At least on a logical level know that people who make threats are bored internet kids who haven't been outside in the last 10 months.
I can also confirm this. As soon as the attacker or attackers stop, one feels neglected. Not in a way that you wish the old situation back, but still
