A Twitter status update caught my eye earlier:
Obviously curious, I followed the link to BSRPDNSC and tried a query. The calculator works, but look at the associated TXT resource record:
$ dig 1.2.+.rp.secret-wg.org txt ;; ANSWER SECTION: 1.2.+.rp.secret-wg.org. 10 IN TXT "3" 1.2.+.rp.secret-wg.org. 10 IN TXT "This DNS message (including the RR(s) in the additional section) is confidential, proprietary, may be subject to copyright and legal privilege and no related rights are waived." "If you are not the intended recipient or its agent, any review, dissemination, distribution or copying of this DNS message. or any of its content is strictly prohibited and may be unlawful." "All messages may be monitored as permitted by applicable law and regulations and our policies to protect our business." "DNS messages are not secure and you are deemed to have accepted any risk if you communicate with us using DNS." "If received in error, please notify us immediately and delete the DNS message (and any of its sections) from any computer or any storage medium without printing a copy."
A disclaimer in the DNS. That made my day! ;-)