I have never had a confrontation at a resort that was anywhere close to escalating to a physical level. However, I have exchanged hostile words a number of times.
I try not to be too rude about it, but sometimes people need a heads up that what they are doing is not courteous, polite, or most importantly, safe.
One situation that seems to happen again and again, is people stopping around blind corners of winding traverses. This is really common at Bridger. Its not the end of the world, I know, but its pretty annoying. You are trying to keep your speed up for the rest of the traverse, and you round a corner, to see three or more people completely blocking your way. You have to slam on the brakes to avoid hitting them, hike above them, and then continue on. I try not to sound too angry, but I will always say something along the lines of "Thats not the best place to stand guys".
A couple of seasons ago at Aspen, I had been eying a cliff that was just a few hundred yards outside the ski area boundaries. Now I'm not much of a hucker. Although I enjoy it, and enjoy trying to go bigger/more technical, I am honestly just too scared to go very big. At the time, this would have been the very biggest cliff I'd ever hit. The landing was a tiny bit flat, and there was no room to ditch your speed afterwards. You had to land perfectly, and then point it out through a break in the trees. Because of this, I was waiting for the snow in the landing to get nice and deep.
Well one day I was just about feeling ready. I was pretty scared, and convinced myself, that since there was more snow forcasted for the next couple days, I would wait and see if the landing got any better.
I come back after we'd gotten 6"-1', and was not nervous or afraid at all. I was feeling great, and knew the landing would be great. Well I roll up to the take off, and peer over, planning on just taking one look, hiking up a few feet, then pointing it off.
I look over, and I see two people, who looked to me to be "gapers" traversing directly through the landing.
Now, while I think that everyone has just as much right to fresh snow as anyone else up there, theres no harm in being considerate. My knee jerk reaction was to yell at them for traversing through my landing, which I did. They responded by saying that they didn't realize it was a landing.
It then dawned on me, that they were most likely traversing, in hopes of finding something easier and maybe getting back to a groomed/heavily traveled run. What I don't think they realized, is that they were heading into an area that you would either have to hike out of to get back to the resort (if you knew where you were going) or find your way through the dense trees at lower elevations down to the valley floor, and find your way across a river. I had not seen any avy gear, and they did not look to have a clue where they were headed, so I figured I'd better head after them.
I skied around the cliff, caught up to them, and asked where they were headed. I was told not to worry about it. I explained to them what they were getting into. I told them that, even if it was their intention to go that way, there was a better entry point that would give them more good powder skiing before the trees got nasty.
They responded by cursing at me and then continuing their traverse. I can only assume that they followed my advice after I'd left because I never heard anything about anyone getting lost.
The moral of the story, is that sometimes people need wake up call, whether they want it or not. If it is necessary that I be thought of as rude and obnoxious in order for them to get the picture, so be it. Sometimes its just common courtesy, but sometimes its a matter of safety.