Earlier today I edited my (small) set of Stack Overflow posts to add the sentence "I do not consent to my words being used to train OpenAI" to the end. Within hours, all these edits were reversed and I got a warning email for "removing or defacing content". I did not remove any content. If this small sentence is "defacing", it is a very minor defacement. In no way was the experience of other users made worse by me adding one sentence.

To Stack Overflow, you are not a person. You are "content".