I bet your not so busy you cant wait 15 mins to fly....sit and wait for them to come down.......the problem of not flying the pattern....needs to be addressed before it gets out of hand.....if you have talked to these two guys and they continue to fly against the pattern....depending on your club there should be a grevance form you can fill out, that reqires the board to take action.......usually a formal letter that warns you of your conduct and that if you continue. you will be expelled from the club......I know this sounds harsh but you should see my club....most of the fixed wing flyers have gone to another club, I've seen 4 mid airs in 3 years....too many oh that was close to count....
the problem just gets worse.......good luck