After reading all of this, I can see how teaming is considered a tactic and not a form of boosting. There will still only be one winner; so someone will always be on top in this team. However it is unfair to players starting out, it is in not impossible to defeat a team.
I don't make the rules, I just enforce them.
This problem can be easily fixed if there was no prize in Showdown or Bomb Spar. If it's considered boosting, then they might as well remove the small amount of money you get. You don't get any money from regular gun spar where that IS considered a form of Boosting, so why do you get money in Showdown and Bomb Spar if there is a problem with Boosting?
As far as the announcement goes, I was just reminding the players that this issue was an offense for a ban.
And this is all just my opinion on the issue.