I would think every club has a flight rule that you must fly the pattern when there's more than one model in the air.( to avoid midairs as a safety factor) So if someone is flying 3d stage front and your ready to take off you call out going up and the 3d'er goes right into circle pattern flying until the air is clear again.
At the clubs I fly the members know how each member flies and give a 3d'er the courtesy of free space when he flies, he lands happy that he did his thing and returns the favor to the other fliers.

It's not reasonable and unsafe to fly stage front 3d right in front of another fliers face as he's flying his $$$$ scale model in a reasonable manner.