Thank you for using canning as an example. This is a excellent choice because it is a situation where people think they know what they’re doing and they are just basically posting recipes for botulism. On Facebook there are the rebel canner groups and in those groups you’re not even allowed to mention the word of botulism or the mods will ban you. Because even warning somebody that something is unsafe goes against those communities standards. Canning is a prime example of where the admins have to have actual knowledge to pull off the job.