I think it would be a cool idea to craft a tripwire to alert you when someone steps on it. An example, with a flare gun, rope, two sticks, and duct tape. you create a tripwire that you place on the bridge at the new prison island to guard you while you are looting. Someone walks through the tripwire and a flare shoots into the sky alerting you that someone is coming. Now if you were the one who was crossing the bridge and you spotted the tripwire before you stepped on it, you could carefully walk up to it and defuse it with pliers or a knife or something. You could also make a noise tripwire with a flashbang or a lethal tripwire with a grenade.