There is a huge freaking difference between Off Meta, and a complete new Strategy

Here is an actual Off-meta support: : He sticks around Bot lane, helps out the ADC by being a secondary threat, and tanking some hits, while transitioning into the team's support when it comes that point in the game.

This is a Brand New Strategy: : He takes the support role, but instead becomes a Second Jungler. He roams around and steals enemy jungle, while establishing Objective control with Dragons.

The first one will not get you banned. That is Off-meta that still respects what other players desire out of the game. Can someone be upset if it doesn't work out? Sure, but Individual play is not bannable. The second one, when done to people who have not agreed to it or do not like the idea of it, creates a bad time for the people involved. That is what is actually reportable, being inconsiderate to how others wish to play the game, in exchange for how you want to play the game.

While Off-Meta Nunu may not be perfect for the ADC, they still have a partner, they still have some help, and the lane doesn't become a Miserable 1v2 experience. If you want to try to change up the Meta, be considerate of others. There are plenty of fun people who are willing to try things. Hell, instead of an ADC, maybe play a Mage bot lane instead, since a Mage normally has CC to protect themself. But if you force others who wish to play the game one way, to have to play the game differently without their consideration, all you get are justifiably angry players.

Always keep this in mind. If we're not allowed to choose how other players play the game, why should others get to decide how we play the game? It's a two way street, and in a team game, we need to find compromise.