We live in a 'no fault' generation.
People tend to blame others for things.
For example, it is fashionable to blame alcoholism and criminal behavior on our genes now. However, if your pottery is leaching harmful compounds into food a drink, there is no one to blame but you. To be honest, you probably like to take the credit for your designs. Then you should also take responsibility. If you can calculate the oxide formula of your glaze and do a couple of simple tests you will be in the best good position to defend your use of them.