If you don't want to lose your honour level,
It's so simple.
Sure you might get someone who has no clue about what they're doing, or someone who's toxic. Don't retaliate because often times it doesn't go well. All these people are furious that they lost their rewards, I get it. But is it REALLY that difficult to not type in chat? Wow, you lost 20 LP? Wooow it's not like you can get back to it in 1-2 games. Get over it.