Ninja star thumbtacks for posters and bulletin boards
No one's making these yet, but surely someone's clever enough to realize the geek potential and start marketing them. This is right up Thinkgeek's alley.
chromoly is a new partnership between designer jonathan sabine and ad man adam pickard. the collaboration has only resulted in one project so far, ‘ninja tacks’. the humourous tack design may look like a deadly ninja star, but is really just an elaborate thumbtack. the tack bears similarities to sabine’s earlier project ‘bourgeois brass knuckles’, a clever corkscrew design. both pieces combine ominous appearances with utilitarian function.
I'd buy a set in a heartbeat, along with those fantastic corkscrew brass knuckles.
ninja tacks by chromoly [Designboom]

the latest
latest episodes

http://www.youtube.com/watch?v=3hKM2_0U70c
it would still work as an item to attach paper to notice boards if it was an unmodified ninja star. I have one i made in metal shop years ago and that's what i use it for.
No officer it's not a weapon, it's a drawing pin.