As for me, everything is fine both with using /ej right after getting in the plane, and with fake entry. As it was correctly stated above, it doesn't really give a noticeable advantage (unless used with perfect timings), but kinda adds a set of tactical options in difficult situations. You're right, it's a matter of convention among the players, but I prefer it the way as it is. So,
-1 to 'criminalizing' fake entry or 'inappropriate' /ej usage.
As for c-bug and 2-shots, they're way too powerful in right hands. I see no need to allow using them. Also
-1.
P.S. Strange that the situation has attracted your attention only now, Satvik. Regulars were always using fake entry and /ej from motionless planes, at least since I joined. Anyways, you did right to start the discussion here instead of flaming ingame.
P.P.S.
...while i was Altus at old airport...
Don't scare me.