Subtle or not so subtle threats are now being made by democrat supporting PAC groups. With speech like "supporting Trump means you support the things he does, like overthrowing a legitimate government, jailing political opponents, and using the military to go after his opposition. As a result your neighbors will see you as a threat and may take the appropriate actions in order to protect themselves from the perceived threat."
It looks like the left is trying to stir the pot, and provoke violence. I think that they are hoping for civil unrest or civil war in the event that Trump wins, giving them an excuse to prevent him from being inaugurated.