As a teacher, I can't ignore the network mode (in the old SP, it was mod-enabled and limited in the number of details). It would be very cool if in network mode it was possible to turn on a conditionally "non-combat mode", when damage from other participants and against them is not counted, and collisions pass "through". This is convenient when children test planes in order on one server, but one of them always wants to fool around and starts shooting at everyone. Moreover, the mode should be enabled not on the server (it can also be provided there), but also on the client. A similar mechanism was used in GTA 5 network mode.