Funny I've almost posted a few times sorta on this subject recently.
I've come across a lot of groups of people recently that just don't understand there an unwritten etiquette on the traverse...
MAINTAIN YOUR SPEED & NEVER STOP IN THE TRACK!!!
A couple weeks ago a group of 3 that I was holding speed right behind decided where they were at was a good place to just come to a complete stop about 1/2 way out a pretty long side slope traverse. I was forced to jump out up high and kick sluff down onto them. I decided I'd give them the advice (see above) as I skied past and they proceeded to call me an asshole and talk shit as I skied away. REALLY?? I'm quite patient out on the traverse compared to many I know.
Just yesterday on the high traverse at alpine there were 2 women that stopped right at the top of a 15' dip and lip. As I came around the corner they were at the top on the upside (they had not made it up and obviously just sidestepped up and decided to stop at the crest) with the cornice on their left.
At the last seccond while diving into the dip I realized they were not moving and did a speed check (so as not to launch off the lip on the other side and knock them off the cornice) and ended up not quite making it up the high side and was forced to fall over and pull myself up over the lip. Like WTF!?!? If someone had been behind me we could have been in big trouble since they would not have been expecting me to not make it up at the speed I'd been keeping out the entire traverse previously
As far as powder days out here in CA/Tahoe general rule is just to stay high and keep an eye uphill for people dropping in above you. Maybe the only time you as the down hill skier need to question, if you at that point have the right of way, or they do.. Likely if someone is dropping in above you it is something steep/gnarly at which point you yield to them as much as possible. I.e. Someone dropping idiots at alpine while you are cutting across the wolverine traverse to lower beaver or peeps cutting across chicken bowl while palisades are open at squaw
It is super annoying but you can't really tell someone that they can't ski something just cause they don't have the skills/balls to ski it from the top..
https://www.google.com/amp/s/www.skimag.com/.amp/adventure/ode-traversing
** one point also worth mentioning is that many of the cross slope tracks are first cut on powder days by ski patrol on their morning bomb routes so people tend to follow them after the first tack is set