They might want to level gate higher difficulty missions. You can pull your own weight not playing meta, I personally don’t play meta and do fine even on 8 and 9 difficulty. It is frustrating when a low level player uses inappropriate orbital/eagle strikes on targets which wastes time or does not know the general size of a strike causing friendly fire. I don’t mind that on lower levels, people got to learn somehow but it sucks when a level 13 eats up all your reinforcement budget then causes an extraction failure because they decided to throw out a danger close 120mm barrage causing the loss of that missions super samples.
I was stationed at MCAS Futenma on Okinawa. The US shows no mercy when it comes to crimes against the local residents. Usually the Japanese legal system gets them first then after they spend time in Japanese prison they face the military legal system. We get a whole week of classes when we first get to the island about Japanese culture and they make sure to impress upon how fucked you will be if you cause an international incident. Even minor offenses such as underage drinking are dealt with very harshly. There were two Marines from my squadron sent to Corrective Custody Unit for drinking underage at an off limits bar.