My two cents on this? First off, definitely contact the police on this. You're right that the more you let this go uncontested the more it will continue to happen. As far as the "harmless booby trap", I would advise against that. There is always the possibility that someone could trip and hurt themselves on it. My suggestion would be camera's, either ones connected to your computer or trail camera's like hunters use although the trail cam's would be harder to hide. This way you have evidence if you do decide to press charges. And make no mistake, what she did is a felony even though it was only a camp stove that was taken.
Not sure about Texas, but here in Missouri that wouldn't be considered a terrorist threat. Trying to charge someone with threats is always twitchy at best. Usually the best you can do is get a restraining order. The $1000 worth of property damage though? Definitely a felony. I would personally have to press charges on that one. Not doing anything could make it harder to get a restraining order if that's the route you want to take. Again, not sure of the laws in your area, just know how it goes around here based on what I've seen some friends go through.
