Pitch meeting: aerosolized salvia divinorum + capsaicin + mercaptan + permanent ink gel booby trap laptop bag to deter car thieves. Operation is similar in principle to bank dye packs.
If the thief takes the bag from the car, it's activated, and alerts the owner. When the bag is opened (or remotely triggered), it explodes and covers thief with gel containing the deterrent chemicals.
All of the chemicals above are very unpleasant, but don't normally cause permanent injury, so if an innocent person somehow trips the booby trap they won't be permanently injured.
[EDIT: Yes, I'm aware of that many jurisdictions make such booby traps legally dubious. This is for jurisdictions with sane laws, or for people who are willing to defy the local laws. ]
If the thief takes the bag from the car, it's activated, and alerts the owner. When the bag is opened (or remotely triggered), it explodes and covers thief with gel containing the deterrent chemicals.
All of the chemicals above are very unpleasant, but don't normally cause permanent injury, so if an innocent person somehow trips the booby trap they won't be permanently injured.
[EDIT: Yes, I'm aware of that many jurisdictions make such booby traps legally dubious. This is for jurisdictions with sane laws, or for people who are willing to defy the local laws. ]