Strange neighborly behavior

I first mentioned our X neighbors last month. Well, they're still doing strange things. Tonight at around 10:25 PM, we hear a weird knocking/thunking sound. We were in the computer room and the sound seemed to come from outside by the front of the house or downstairs. So we went to the living room and peeked out the window overlooking the street. What do we see? One of the X neighbors walking away from our house while holding & twirling a long object that looked like a golf club. Where he walked away from looked like he had been standing close to our garage door area (which the upstairs living room overhangs a bit). DH's car is parked in the driveway, so this is even more reason why someone wouldn't normally just stand or hang out in that area. Very strange neighbors they are indeed, loitering around our house in such a surreptitious manner as that.


.