C3, have a similar batch of those guys nesting in a split cedar. Queen must be in there. They are attracted to light in the barn at night but so far, have not been aggressive. In the cold AM, many are pretty much in a trance on the barn floor. Rather than stomp them, I sweep them into a dust pan and toss them outside, where they eventually warm up and go back to their hive. A compassion I can't and won't defend. Maybe that's why they've left us alone... In the next few mornings (when it's cold), I'll spray a few cans of expanding foam in the gaps of the cedar tree to encase them. More of an "area denial" weapon, but hopefully equally effective. I derive no pleasure killing much of anything (ticks, black flies, horse flies, etc. excepted). Were there a way to just discourage them to hang around here, I'd go with that.