You do not need to sharpen the point. With some force and momentum the point will penetrate deeply. The wound is nastier though. I have seen such wounds caused in workplace accindents where people slipped with screwdriver and stabbed themselves.
Potential stabbing tools are sold in almost all hardware stores. If you do not want to go for expensive tools, you can buy 9" nails by the pound.
I have seen a documetary about a town in Scotland where they tackled knife crimes with a totally different approach. They installed a program to give the youth a better perspective by educating them and help them find a job. The documentary said that they actually were successful. They may be onto something.
The British have my pity. I hope that does not spill over to continental Europe.
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If it isn´t broken, it doesn´t have enough features yet.