You cannot get punished if you do nothing wrong. Putting your entire team on ignore is not punishable; in fact i know a few people who do it every game regardless of their team disposition (which i find a bit weird), but they have never gotten any kind of punishment.
The "refusing to communicate with team" report no longer even exists in any real sense, and it only applied to fairly extreme cases, like someone spending the entire game following the jungler around stealing creeps, or never leaving toplane turret.
As long as you play a normal game, do not act like a brat, do not troll, you will never get punished. Playing off-meta, ignoring chat and weird builds or strategies will never get you punished (riot has confirmed all of these at various times in player behavior blogs).
For the same reason, people ignoring their given lane and role is not punishable, but if you refuse to give in to them, they will either go where they belong, or do something that will be punishable, either feeding, afk or simply flame their way to a 24-game restriction.