pharaohgeek's response is an eyeopener. You could provide an easy to use guide for people to install your root certificate into their browser. Then it becomes

pharaohgeek's response is an eyeopener. You could provide an easy to use guide for people to install your root certificate into their browser. Then it becomes a matter of making sure that your CA issued certificates are not abused. I think that is a huge risk if you can't make sure that spammers, etc can't get hold of your certificates.