Will your doing so make it worse if and only if people continue the practice?

If you feel that you need to be oblique, a good way to do it would be to indicate what type of evidence makes you think you know what you think you know without saying what it is that you think you know.

example 1: Suppose that from personal experience, I am keenly aware of a form of long term mental damage that could occurs with this practice. I should communicate it, right?

example 2: Suppose that from reading an article while browsing JSTOR, I am keenly aware of a form of long term mental damage that could occurs with this practice. I should communicate it, right?