Waste of money mostly, and it may be illegal...depending...link to an earlier thread here on the topic

www.ar15.com/forums/topic.html?b=6&f=1&t=195532

I have some very good friends in South Africa who use rubber on a very regular basis, and it works well for them...in crowd control. (In fact, one Captain just ordered 3000 more rounds due to Security Guard strikes due to start up again this week!) But darts? "Flechettes"? Some jurisdictions here consider them to be "armor piercing" ammo if I am not mistaken. I can also tell you that the state of Florida considers stuff like "Dragon's Breath" and assorted other junk to be illegal and unlawful. Do you really want to have a slick prosecutor trying his / her best to make you out to be a loony-tunes? Or would you maybe like to be seen as a regular Joe who was concerned for his / his family's safety? (Believe me, stranger shit has happened!)

Even "Grandpappy" loaded his old shotgun with #00 Buckshot for HD.