You do not need to inform your teammates but it's always nice of you to do so, should you however use the traps in a way that is making it obvious that you're intending to ruin the game for your allies there's an issue.

I'll give an actual verdict to this once you've posted the proof.

You do not need to inform your teammates but it's always nice of you to do so, should you however use the traps in a way that is making it obvious that you're intending to ruin the game for your allies there's an issue. I'll give an actual verdict to this once you've posted the proof.