etiquette for replying to daily digests

Hi all, I (and I'm sure many of you) subscribe to daily digests from NANOG to keep things concentrated. However, there are sometimes messages in the digest I'd like to reply to, and I don't want to be that guy who just replies to the digest and opens an ugly new thread. Curious what workflow/process any of you use to do so, and what the best/netizen-polite way is to end up with a reply that's appropriately threaded. Do I just need to mirror the subject line? *Alex Buie*Senior Cloud Operations Engineer 450 Century Pkwy # 100 Allen, TX 75013 <https://maps.google.com/?q=450+Century+Pkwy+STE+100+%7C+Allen,+TX+%7C+75013&entry=gmail&source=g> D: 469-884-0225 | www.cytracom.com