No Harley, not a good idea. If the owner finds out who did it (if his car is damaged) he may be out for blood.:dead:
Not a good idea (not wise) to play fire with fire.
You are correct that there will likely be consequences. Bigbird should not in any way hide his actions re the nails, so he cannot be accused of laying a trap.
It will be interesting to see the thief, who was explicitly warned not to steal, claim damages incurred while commiting a robbery.
I would pay good money to watch that show. If Bigbird would not stand his ground, but instead be intimidated by a complaining thief, he should go back to whence he came.