Seriously, with the next event, just don't show the team standing until after you join a team. People will always choose the winning side if they know which side is winning. Even Pokemon Go didn't mess this up. (Team Mystic btw)

N.B. Rigging is defined as manipulating something to give an advantage to an individual or a team at any point or prior to the contest starting, suddenly closing the gates for one side is suddenly massively increasing the player count for one team, which turns into an advantage and therefore it's manipulating the contest.

Now if fire was in the lead and they closed you from joining fire, it would still be rigging. You're forcing the score to change.
Sidenote: EU still has both sides open.

Please Help !
Thanks !

I didn't find the right solution from the internet.

-teaser video