So, this is what I get after contacting Riot player support. Yeah, turns out your team can dictate what summoner spells you pick folks otherwise you get banned.
If clarity is such a bad spell that you'll be banned just for taking it, why not just remove it from the game?
While they're at it, remove all the worthless champions, items, and runes as well.
In the future
-banned for taking armor rather than hp yellows!
-Banned for not using optimized rune pages created by Korean God TM
-Banned for not picking tier 1s champions
-Banned for not using the correct summoner spells; imagine if they lock specific summoner spells to specific champions
Ie, Karthus can only take revive/TP, top laners can only take TP/flash, ect.