Allready did. The only 'skill' these people need is that they should read the topic where the pass is and return there frequently (they might even pick up other information). This way people who want to make a small effort to join these games are able to join, while other gamers who aren't even aware they aren't in Skirmish are not...
I got the feeling that every time I talk about the game experience most people are like 'who the hell cares,' but eventually it also has a big impact on the game. Since we can't force people to watch a tutorial or read (team)chat or use common sense I think this might be a good alternative in the future.
I still can't figure why people get kicked from pub's multiple times while team hampering, only to return to the game continuing their behavior without asking about the kick or even noticing they got kicked (wtf)