Currently we can lock out everyone, or everyone but squad/platoon. I would like to lock people out of my guns, specifically, but allow others to get a ride. Basically, same options as locking people out of vehicle: squad/platoon gunners only, or just lock everyone out. I don't mind people getting rides, but when some genius starts spamming the guns wildly wasting my ammo at nothing and in some cases accidentally hitting friendlies, I have to lock everyone else out of my vehicle to get rid of that person.
Yeah, I agree w/ OP it's a good idea. I was just replying to "I have to kick everyone else out to get rid of a dumb gunner" when that isn't the case. Bad wording on his behalf.
I get around this by squad-locking my vehicles immediately, letting my squad take the guns, and telling the pubs to be patient and I'll take passengers once we're set up. Seems to work out, usually.