Frankly, I don't think anything is more dangerous than gasoline, and people buy tons of that. Why Germany should restrict KBr escapes me except that bromides will put people to sleep. It might have an illicit recreational use. Possibly bromine can haloginate organic chemicals used in the manufacture of street drugs. They restricted the sale of iodine crystals in Calif. because people were using it in some recipes for meth. But silver nitrate is a very useful chemical. The danger to the public is slight.