It enables machine-stealing. The sort where the whole content gets copied and hosted on a content farm. This is admittedly a smaller threat as those rank very poorly in the search results. I was mainly answering directly to the parent comment who doesn't understand why people don't like their work to be stolen.

This is what stops me from open sourcing the whole website, since it's just Markdown. It would be good to open it up to contributions, but the website is already copied enough as it is.