"BAD BOOZE" 

NOTE: I found a website where it gives me the conspiracy and then the truth, so here is one of them. I may do a couple more in the future. But there is one that is a little touchy that I'm iffy on posting, but I may anyway. It happened, people should and may already know about it. 

Here you are, anyway: 

Conspiracy: During Prohibition, the government poisoned alcohol to keep people from drinking.

The truth: Manufacturers of industrial alcohol had been mixing their product with dangerous chemicals for years prior to Prohibition. But between 1926 and 1933, the federal government pushed manufacturers to use stronger poisons to discourage bootleggers from turning the alcohol into moonshine. That didn't stop the bootleggers or their customers, and by the end of Prohibition, more than 10,000 Americans had been killed by tainted booze.