Is it allowed to insult in pms?

Since riot banns people for no reason when you insult people who deserve it I am trying to tell people to uninstall who should in a way that doesnt affect me. The logical step would be through pms but would I run the risk of getting punished for that (for no reason)?

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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