My friends and I were checking out a new shooting location past Sultan (ok'ed by the Snohomish County Sheriff and DNR) to test and zero our AR's. While we were there, 3 Russian guys rolled up on us. They obviously saw our cars. Brought with them a pistol and 2 large bags of bottles. One, we though it was messed up. Two, we were already set up in this small flat area, so there wasn't enough room for two groups of shooters. Actually, we would've if they didn't bring their bags of bottles. We pretty much told them we weren't going to squeeze in nor were we going to shoot over them while they shot bottles. We suggested they try other spots we saw on our drive up. They deliberated amongst themselves and after a few minutes they left. So my question is, could I and should I have done something about them? For example, calling the Sheriff, getting their license plate to report, etc.