Key Rules for Basketball

I'm in charge of a basketball tournament at work right now and I don't know anything about basketball. Here's what I learned watching the games.
  1. There's only one ball per game
    I had to explain this one because they kept trying to play 2 per half-court. No.
  2. You're not supposed to climb the hoop after you score.
    Seriously?! Why?
  3. The ball should be bounced, instead of kicked
    Why were they doing that?
  4. You can hit the ball out of someone's hand with a crazy amount of force
    If it was someone's head, they'd totally decapitated.
  5. There's a losers bracket?
    Why is that a thing? You lost.
  6. I'm really worried about concussions.
    I feel like everyone needs a helmet.