This has been brought up before, but it's still happening. I'm using the RotC Sanctuary plan. The dang siren is constantly going off. If I turn it off, it just turns back on a minute later. I had to disable it. Also, when the siren turns on, many (all?) of the settlers run to the siren location. I thought it heralded an attack on Sanctuary, so the settlers aren't acting appropriately as they should be going to defensive positions? Also, there's never an actual attack.