I simply explained what my concerns are and why I'm opting out. I think that is a perfectly appropriate thing to do and has nothing to do with villainizing anyone.
I also think that it would be appropriate for you to disclose that you work for Google if you contribute to a discussion like this one taking the side of your employer.
I appreciate your view on that, but I'm expressly not posting on behalf of Google or in my role as a Google employee. I don't think it would make sense to clutter the HN threads with disclaimers considering that just about every topic here that involves a tech company will have folks from that company posting, or who have investments in those companies. It's not as if I keep it secret who I work for.
I also think that it would be appropriate for you to disclose that you work for Google if you contribute to a discussion like this one taking the side of your employer.