I would like to suggest differet way of looking at this.

Permitting "randoms", with their intentions that cannot be deciphered, can introduce more realistic war-like conditions. A certain "fog of war" is recreated by this little bit of chaos.
A relistic dogfight needs some rookies who can be both a source of frustration to their experienced allies, and a source of pleasureto their enemies

I definitely do not consider myself a veteran, but am very interested in dabbling in a campaign that is so easily accessible to everyone.

And, as Bluedragon says, you can restrict access to specific games, if you want.