How about this for a mission editor option. I would find it very useful if an option was available for only people in the same squad to see a mission. Also for there to be the option for the mission creator to make the mission visible to other squads. Best way to do that would probably be a section to enter in the names of squad COs.
Having this option would do a couple of things. Advertising missions in the normal manner does two things. It opens up the chance for spies to blow the whole thing and draws in players who don't always know what there doing which can lead to compromises. The solution we currently resort to are simple tower missions where all instructions are given verbally or by text without the aid of the mission editor. Sometimes squads, especially the larger ones, want to operate in a coordinated manner but also do it by themselves. And if you think this will hurt team play and all that, squads are running tower missions all the time. This option will simply make it easier to continue what they're already doing.