This is actually a big deal in America, and something people pay very little attention to...
According to a 2014 article by Libertarian News: About 8.6% of the adult population has a felony conviction, or about 20 million people. That works out to about 1 in 12 adult Americans.
That is a staggering number.
Not really.
<rant>
Considering 129 million Americans admit to having used pot, the number of felons should be 100 million higher. According to federal law, 52% of the population should be banned from owning guns.
And of course, the U.S. gov't owns the patent for the medical use of marijuana. Link to Patent #6,630,507
</rant>