Same reason some people top post. They just ignore the conventions.
I have a special issue: Using Gmail on a Phone or Tablet (I have both). I have yet to find a Straightforward way to Snip lots of lines, using the Android App. Also, Gmail "hides" the lines from the prior responses in the Thread, making it *WAY* too easy to Top Post. (You have to touch a link to see them).
So, since I "feel your Pain", I generally save my Debian Responses for, when I get home with, either my Debian 9 Laptop, my Ubuntu 16.04 Laptop (to be upgraded to Debian 9 in the next month), or the Chromebook I am typing on now.
Seriously, how do others of you deal with navigating this Debian List on Android, while being a "Good Netizen"?
Thank you and best regards,
Kenneth Parker, Computer Consultant