And yet, players will continue to feel that the competitive integrity is compromised so long as other players suffer penalties for having trolls on their teams.
League (as any other game) will never be free of trolls.
Because not a single gaming company in the world is moderating their community like Korea does to their citizens. Even if 'm saying Blizzard is harsh towards their rule breakers, they still persist despite their best efforts.
Real trolls make up a really tiny percentage of people who get removed sooner or later.
Most of the people that a lot of others confuse for trolls are just salty players (tilters) who continue to play the game after their patience has worn thin. No one is immune to tilt and some people are great at realizing when they are tilted and what kind of an impact this makes to their performance.
In reality, people always remember their negative experience more vividly and for longer than they would a good one. If you played 1000 games and you get paired up with a feeder and a super carry, at the end of your thousand games you'd remember that one troll who absolutely tilted you off the face of the earth with his "ward Soraka" cosplay that went 0/20/0 than you would a Zed that went 20/0/20 and carried all 4 of you to victory.
I still remember that one retarded Tryndamere who i got paired with two games in a row and in both of his games, he legit trolled by purchasing all the boots he could and suicided into enemy towers in each lane, just shit on everyone. That was two seasons ago. And at the same time, i couldn't tell you which was my most notable game where i noticed a player carry my team's ass to victory, around the same time in Season 5.
They should be pioneering new technologies and methods, rather than only doing what other companies (such as Blizzard) are already doing.
Riot Games is a gaming company, not an R&D company whose sole purpose is to discover, invent and implement new technologies. As a matter of fact, Riot does have an R&D department that's always exploring new technologies to implement in the game as well as use it as a foundation for their future systems. And that's not all they do.
League of Legends: Supremacy and Mechs & Minions are some examples of what comes (was never meant to come) out the door.