Из треда про ножи. Скатились к метательному оружию.
Case: Government prohibits guns for self-defence, but you desperately need a gun.
Solution: Go Sakuya*.
*In case of low skill of knife-throwing try something resembling a brick or a plate. Broken 3,5'' HDD should be fine.
HDD Brick is highly effective on 5 meter range and useful even against riflemen. It's important that this kind of weapon doesn't need any kind of concealing rather than being put in pocket. Moreover, its possible to accuse offender for making you having to literally throw your precious data.
poisonous needles on every edge of your HDD. It is to note that a spare space allows to use syringes, so you can use HDD multiple times.
Also, you always can buy a broken or obsolete HDD for no more, than 5$ (or only 3$ in bulk) or just try to buy some as scrap on local recycling factory for some loose change since you will need only aluminum cases.