Ah so this trigger has 5% chance of activation only if enemy units are present nearby city?I'm familiar with the building and the effect. The alert is due to animals that wander by the city I believe. Rather than disabling the tag, I'd prefer to maybe investigate what can be done to filter the alert further. It's been a very low priority bug issue since it's reporting. Elimination of unnecessary notifications are less than compelling in light of the more important corrections being made for the years we've spent in development here.
From description it sounded like it always has 5% chance of triggering even if there are no enemies.