Well I also participated in alpha tests that the participants really tested and reported bugs but the devs just ignored and the game was released with those bugs and after the players of the final release complained a lot, they fixed and claimed they didn’t see that bug :/
So it needs effort in both sides and rules. Recommendable to use a proper bugging report such as Mantis Bug Tracker or BugZilla, otherwise you get huge posts on forum threads that talks more about the game and suggest things then actually report bugs.
Also some devs make beta test to see the general feeling of the game, which is not a bug, just the first impression. So that is why rules are necessary or at least good communication with devs.
