Alright, think of this scenario and say how'd you react, I'll say mine at the end.: You're playing bridges and are green team,
at the start you put a sign saying "Welcome to green island". You're miner so naturally you go mining and find diamonds. Once the bridges fall, all of your team is killed by red (Put how you'd react to this) and when you come up you see your sign is destroyed. (And put how you'd react to this, that's all).
So.
For the first one I'd be like : "Eh, I'll just have to be careful then..."
And for the second one: "YOU MONSTERS, I WILL KILL YOU ALL 1 BY 1 AND THEN FILL YOU ISLAND WITH SIGNS AHGHGHGHHG"
So...