>>657992>making it yourself can be pretty dangeroushttp://www.preparednesspro.com/to-bottle-or-not-to-bottle-butterNo more dangerous than anything else you do to preserve foods. If something is sealed and bulging then don't eat it. Same applies to store foods.
As someone who home pressure cans and water bath cans most of their own garden/farm crops I can say that canning is super easy to do. So, long as you follow safety measures, use well maintain-ed equipment, and follow guidelines/proper recipes there's never a problem.
