Salt, vineger, and a pinch of toxic

Recently I've been coming into games where people on my team start arguing for picking a specific character. I do know that there are characters that work very well with each other and picking other characters ruin their plans. But here's the thing: people really don't know whether or not they're really good with the character they have chosen or they're picking whoever. This leads to those two who start arguing to report each other for their own reasons.

Whenever I see this I usually just stay quiet and don't interact with them when they're talking to me. This is usually the best situation in my eyes. I have yet to see if this works every time.