High levels farming low areas?

[Veranish]

What is the etiquette behind high level people farming say the wall at crushbone or the elite guards in Blackburrow, especially when the zone is at capacity and everything is camped?

I asked politely a couple of people (30+ level folks in CB) but they just said "I'll tell you when I leave." and it was hours later, I logged back in, people still there.
My group out leveled the entrance/rando's, and there were five of us

Back in classic I never really ran into this problem, but once you're twice to three times the level of a spot there really are better places to farm money-making things.

What's the etiquette, should I just deal with it or do I get to raise my fist in angry righteousness?

Screenshot of kinda the situation: THE NAMES HAVE BEEN REDACTED TO PROTECT THE INNOCENTTTTTT. And possibly less innocent, I'm not mean.

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