The entire point of the thread is this: Suppression is a requisite of war, even virtual war. Spawn camping is suppression of the attacking ground vehicles. Since it can be done, and in fact was designed into the game intentionally, then it is the right of a player to do so.
Anyone that thinks to the contrary is not being realistic. In a game where you can see one guy fly formations of B26s at fifty feet to a nearby field, for consecutive sorties over and over until the field has been completely degraded, you should expect this. If, you don't expect it, you need to take up knitting or some other low brain activity.