The title itself. Just like how riot discovered that rewarding positive behavior can help reduce the toxicity of the community a little, they should try to do the same for opposing teams. Lately I've been playing normals again to take a break from ranked and I've noticed that everyone is toxic to their enemy with words like "Nice flash" - "Nice camp, you're trash" - "I'm 5/0 and you can't farm" etc etc..
And today I had a game where me and my enemy laner had a nice exchange of positivity with "WP" and "You got me" etc
I wanted to honor him, we should bring that back