These often are not meant to be changed at all. For example, such lists exist for long-distance hikes where they indicate water sources, camp sites, emergency phones, and other really critical features. For such lists, I would really like to be able to set them read-only once for all, possibly except for some special fields (e.g. a comments).
Maybe there could be editable and read-only waypoints, and they could be displayed differently so that it also becomes visually clear what they are?
I got caught so many times by this "feature", and I am certain that I am not the only one...
Personally, I would be perfectly happy with a global option to disable any "interactive" waypoint movement. If I really want to do that, I could always enable it temporarity...
Apart from that: thanks for this otherwise really great software!