After you get hit, your head is on a swivel forever. I've been hit 3 times in last 10 years or so, 1 standing in line waiting for beer at afterski (wtf) 1 time standing just outside the hill prepareing to take a leak near trees when a dude came flying with 0 control my helmet and backbrace saved me 100% in both situations. And of course last year twisting my knee 180 degrees by my GF filming me, trying to keep up. I was on my my 12-13M skis to lay some tracks. she never even tried to stop as the gopro 360 revealed. I try to be aware of just how fast I cross the slope on shorter radius skis so people are not caught off guard if straight lining or whatever.
I also find it funny that most of the time people looking around them/back, are the ones going fast. There are always heavier and better skiers. Snowboards.. not so much, even the guys on a racing board are fairly slow.
Here in europe the green, blue, red and black is a bit all over the place, our local black run I can barely break 55-60, while on other hills, a blue run can give you 65 easy and be super steep. The best carvingruns are usually the blue & reds.
It has been a bit crowded so far this year, but fairly low incident count, a lot of people do have less of a margin than my personal preference. Only a few runs were open so people congested on the single black run, and due to this I dialed my speed back 15-20-25mph, its early season, people dont have their A game, myself included.
Nobody will pull your pass for just carving the runs without scrubbing speed if your in control and just do it smooth, but there is no point of going closer to people than you need. Heck, they usually dont bother if you just straight line it in hockey either, terminal velocity on non waxed park skiss and baggy clothes are not that great.
They do adress people sitting around on the slopes, and even our young kids are tought not to do this. Most of the time when you see this its snowboarders or forreigners.
Before coming to a stop I always look around me as to plan so others can predict it, and I wont get in their way, going from 50 to 0 without doing so just seems illogical, I dont hit full ABS in left lane on a highway.
When skiiing with friends we always split the "lanes" and how many in a row with X distance and just lay out the runs. I'm to old to bump into friends. I also much prefer skiiing the same tracks, vs opposite and crossing near center.