Listing off the Summoner's Code doesn't make your case...
It's a good thing I pulled from the Terms of Use, and not the Summoner's Code, then, huh?
The Code of Conduct was not design as a general guideline and using it as such is wrong...
Except, it was designed to be a general guideline. Like, here's the rough version:
I. Don't impersonate others, especially not Riot Employees
II. Don't post identifying information about yourself or others
III. Don't harass, stalk, or threaten others
IV. Don't break copyright stuff
V. Don't use offensive chat (especially not hate speech)
VI. Don't spread viruses or malicious software
VII. Don't spam the chat
VIII. Don't scam/defraud people
IX. Don't use unauthorized third-party programs that screw with the game
X. Don't try to access non-public areas of the game
XI. Don't create a Screenname that breaks rules I, II, or V
XII. Don't leave a match until it's actually over
XIII. Don't play on another person's account, especially to boost them
XIV. Don't encourage others to break any of these aforementioned rules
It's a guideline of stuff you can't do, and using it as a guideline is well within its intended purpose.
...The Code of Conduct was written to be able to punish whoever, whenever.
And yet, Riot doesn't ban just anyone and say "you broke rule number...fifteen. banned." - they only ban players who break the rules continuously and refuse to play by them.
And, also, to address something you said in a separate comment string:
Retard isn't considered hate speach(sic)...
You're wrong on this. Calling someone a "retard" as an insult is hate speech. Hate speech is:
Hate speech is speech that attacks a person or group on the basis of attributes such as race, religion, ethnic origin, sexual orientation, disability, or gender.
Intellectual Disability held the term "Mental Retardation" at one point, which, wow, I wonder why it changed?
And, since mental retardation/intellectual disability is, as the current name implies, a disability, using the term "retard" as an insult is in fact hate speech.