How are there consequences for being caught if it's impossible to detect?

Moreover, why stop here? There are many great rules that are impossible to enforce. Why not a rule that the author isn't allowed to have any racist thoughts when writing the material?

We can't read minds, but it sure is a nice thing to care about, don't you think?

It doesn’t always have to have consequences when it’s a curated access club like the Oscars. It’s ok to have cultural norms that aren’t enforced by consequences, at the very least some of the ethical participants will follow them. I know that I try to follow the spirit of the clubs I participate in, and if they don’t have these types of statements often I just don’t know what the community thinks is ok.

It breaks down when assholes join, or the overly self-interested. This mindset permeates America today, but there are still many collective organizations that don’t need punitive measures. These are less common but when you find them, it’s often a positive signal.