Response to the Open Letter to Parents
(TL;DR: both sides should be more involved. Real time parenting + technical support makes this more efficient and effective.)
If children cannot control themselves, why not help them by just taking real actions?
Riot Games Korea has already developed a time limit system that allows for customization and explicitly limits the time that a child can play on league (http://imgur.com/DSk5Xdy), so why not us? Of course, I am not belittling the author's intention of writing this letter, and the incentive is great. However, sometimes it's easier if both parties can be involved during the process other than just single-sided parenting .
After all, Riot developed this fun game, so that does not exempt Its responsibility in the process.
Just a little personal jibber jabber.