I just want to clarify this for everyone, so that no one who's uninformed gets lead astray by the people who don't know the rules and who are trying to say his punishment was false:
Summoner's Code rule number 1 is Support Your Team. In paragraph 2, it states:
* Being a good team player begins at champion select. Be open minded when considering the needs of your team. If you're the last one to pick, try to fill a niche in your team that hasn't already been filled. If everyone's picked and something stands out as a deficiency in your team composition, try asking for another player to fill the gap, or change roles to embrace that responsibility yourself.
Whether or not you _like_ that this is a rule is a different matter. But as it currently stands, selfishly troll picking a "strategy" that requires your entire team pick and play around your poor choice, and/or refusing to play your assigned role in any Draft mode just because you don't feel like it, _is against the rules._ Now, it will take multiple games of this to actually see punishment so if you wanna skirt the line every now and then, they won't catch you. But do it consistently like Nubrac did, and you will receive punishment.
This is not my _opinion_ on the matter. This is and has always been Riot's interpretation of their stated rules. Stay safe, and be a team player.
It's exactly like following the chat rules. Whether or not you agree that calling people trash every game should warrant a punishment, it will.
Edit: I'd like to mention, if you want to do such a thing in Blind pick, where roles are not assigned, you could make a much stronger case for not following roles. But if you want to play either Draft mode, Normal or Ranked, then your duty to support your team begins by following your assigned role. Or at least asking if anyone will trade you and accepting their decision.
If you don't want your role assigned, then you're free to not play the Draft mode. As it goes, whether you decide to only play normal blind or decide you're fine getting punished for it, you'll miss out on the Victorious skin either way. The punishment you receive is the consequence you get for deciding not to be a team player. If it's worth more to you to get to be selfish, then by all means embrace the punishment you asked for.