Normal is not as serious as ranked, I agree. I personally don't take it as seriously as ranked at all. However, the game is exactly the same, it just has less impact on you. Less impact on your account means you can play normals when you think it's a bad time to play ranked.
Normals are not a place to abuse your teammates, disconnect, throw the game, instalock, or NOT GODAMNN TAKE OBJECTIVES.
"Hur-dur it's just norms idgaf you're toxic."
Stop for a second. Get out of your current mindset. Read the sentence as if "norms" was ranked. You will see you are acting silly. Normals are a place to take a break from the competitive play of ranked. You are free to play Thresh jungle, or Sona top if you want, as long as you are thinking strategically as you do it. Please. Get out of this mindset, and play with a beter attitude.