I didn't want to interfere in this topic until now and yes the server rules didn't mention it, that it is forbidden.
But please allow me to quote the Geneva Convention:
"OCCUPANTS OF AIRCRAFT
Article 42 [ Link ] -- Occupants of aircraft 1. No person parachuting from an aircraft in distress shall be made the object of attack during his descent. 2. Upon reaching the ground in territory controlled by an adverse Party, a person who has parachuted from an aircraft in distress shall be given an opportunity to surrender before being made the object of attack, unless it is apparent that he is engaging in a hostile act. 3. Airborne troops are not protected by this Article."
Source of quotation: https://ihl-databases.icrc.org/ihl/WebART/470-750051?OpenDocument
Good night chaps