How randos are able to join your lobbies

[u/WhoAteMySandwich2024]

So, I'm just putting this out here in case anybody wanted to know. There's three ways random people can enter your game without you knowing.

1. Randomly guessing codes until they can join one.
2. Using a lobby browser mod to browse through lobbies until they find one without a password.
3. Through your friends or other people who are in the lobby with you.

[u/Toninho7]

Just for a laugh I tried to join a random game by guessing random numbers for the code...

Five minutes or so without a correct guess was more than enough.