You're all adults, right? And you're telling me you don't know how to communicate like one? You can say "MCH, you need to grab a tether as well", "Healer, at this level Cure 1 isn't good. Try using Cure 2!" "Tank, your gear isn't good for this dungeon. You can buy poetics gear from so/so". Nothing I have said here is reportable and even if I did get reported for saying it, I'd be very hard pressed into believing a GM can review this and think I'm scum of the earth and have me banned for the rest of my life.

All the rules are saying is don't be rude about it. Your rights aren't... being infringed all because SE is asking you to have some respect.