"don't get on skin-Mojo bag". It means Hazmat, the NSA, etc has to get involved to safely remove the material and test it. It means thousands of dollars in tax payers money."Mo Jo bag"?? It's meaningless!
It also means every mother in your neighborhood is gonna feel her children are threatened. Don't leave bags of powder around with vague threats of poison attached to them. This has nothing to do with free speech.