For those of you who can't be bothered to read the code, here's what the comment says.
I stand by my words here: If you are considering removing this warning, then I ask that instead, you remove the XScreenSaver software from Debian entirely. I believe Gnome-Screensaver will be more to your liking anyway. /* If you are in here because you're planning on disabling this warning before redistributing my software, please don't. I sincerely request that you do one of the following: 1: leave this code intact and this warning in place, -OR- 2: Remove xscreensaver from your distribution. I would seriously prefer that you not distribute my software at all than that you distribute one version and then never update it for years. I am *constantly* getting email from users reporting bugs that have been fixed for literally years who have no idea that the software they are running is years out of date. Yes, it would be great if we lived in the ideal world where people checked that they were running the latest release before they report a bug, but we don't. To most people, "running the latest release" is synonymous with "running the latest release that my distro packages for me." When they even bother to tell me what version they're running, I say, "That version is three years old!", and they say "But this is the latest version my distro ships". Then I say, "your distro sucks", and they say "but I don't know how to compile from source, herp derp I eat paste", and *everybody* goes away unhappy. It wastes an enormous amount of my time, and kind of makes me regret ever having released this software in the first place. So seriously. I ask that if you're planning on disabling this obsolescence warning, that you instead just remove xscreensaver from your distro entirely. Everybody will be happier that way. Check out gnome-screensaver instead, I understand it's really nice. Of course, my license allows you to ignore me and do whatever the fuck you want, but as the author, I hope you will have the common courtesy of complying with my request. Thank you! jwz, 2014 */