Hello! Here are several methods besides that you can use to avoid cheating until SMG adds that:
1. Play Automatch. Collaboration is basically unheard of there.
3. When you create a game, slowly increase the max players by one slot each time someone joins because cheaters generally join in groups of two - so they won't join a game with only one space.
4. Block a player you know is collaborating from joining your game by sending them a friend request and unfriending them if they accept or letting them reject the request - either will block them from joining your games.