So, instead of providing all our comments for free to LLMs, how about adding a copyright notice to everything we write?
Legally everything you write is already copyrighted, and no notice is required. Creative Commons licenses are a way to reduce the restrictions on what people can do with your content. They don’t impose any extra obligations beyond what would exist without any copyright notice at all.
My point is that adding the CC notice doesn’t make any violations traceable or even less likely. Your comments are just as likely to be scraped with it versus without it. You’re not adding any restrictions on the use of the comments; you’re just selectively removing some restrictions.