This happened to a fellow gardener and he posted it in the bayougardener forums. Thought you might be interested
"I went to the county co-op today to buy some amonia nitrate for my corn. I left the co-op and was going to the hardware store to buy electric fence, wasn't quite sure where it was so I circled a few blocks trying to get my bearings. I got pulled over by George County, Ms narcotic task force. They imediately pulled me from my car and began accusing me of conspiracy to manufacture meth. They make me take off my sun glasses and hat, then take my wallet out and my pocket knife and cell phone. I had nothing to hide so I gave them permission to search my car ( i never clean my car out). Well I happened to have an empty sudafed box from lord only knows when. So then they want to know where i was heading, i tell them the hardware store. First thing the officer says "going to get some drano"; apparently this is what people use to make meth. I then get accused of trying to ditch them cause i was lost driving around the block in an area i do not frequent alot. Not a good day! I have worked hard all my life and tried to do the right thing, then i get treated like this. I have almost lost my desire to even garden now. Was buying the fence to combat the deer, but not now. I am over it. I really need some words to pick me up.
I found out buying just one 50lb bag of ammonia nitrate automatically gets a red flag from the folks at the co-op, even though the made me fill out paper work to buy it and got my personal info. They fax it straight to the sheriffs office down the road."