Look back at the recent events that just caused a stir in your group, and you will begin to notice some patterns. Someone has been consistently unreliable or unpredictable, and you need to point that out today: either to them or to someone who holds power over them. This is not tattling, this is problem solving, so don't hesitate to share what you have noticed. It's time for you to separate yourself a little bit from the people who are doing things in a way you don't approve of.