Help with something

I need help with understanding some things: My friend recently got to Gold, and I am Plat (IV if that means anything), but I don't play ranked with him on my main as I don't want to demote or something from there (He is a bit bad). Can I get banned on my main for playing on different accounts, and is that considered boosting? Or better yet, can my main get banned from playing on different accounts with him? I can play on my main with him by the way.
Best New

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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