At text: People may complain about readability, but even with jpeg compression, extracting the data points is usually computationally feasible if there aren't too many of them.
Maybe for the way in which they are layering them, but I'm pretty sure the reasoning behind it is inspired by content that has been made into comics for quite some time, for example
My idea: have it so every time the document is opened the names are randomly scrambled. I don't think this would work with PDF or on paper but it's a fun idea
Edit: While it wouldn't work decently on paper, this would work with E-Ink display, and instead have it change every few seconds while the paper is being read.
We have implemented two ways to reveal the
actual names present in an overlapping stack, when viewing a PDF
file on a computer.
First, hovering over the stacked names should pop up a tooltip
with the authors listed in their original order, as shown in Figure 1.
This feature works on many desktop PDF viewers (e.g., Acrobat,
Evince, Firefox, VSCode), but notably not Chrome, Edge, Safari,
or MacOS Preview. It also does not work on mobile devices we
tested (probably because they lack a natural notion of “hovering”).
All it’s done is force you to read a tooltip. Which is an awful idea. The tooltips still create a first-author situation, so now your forced to screw around with a tooltip for…. Nothing.
I think the point is to recognise a paper by its author blob so you don't end up needing the tooltip that much (they talk about it in the paper)
I'm not really convinced that it's worth it, but they did think it through.
Order matters in academia whether the authors want it to or not. Other academics will look at the order of the authors and make judgements based on that, so you'd have to specify something like "authors listed alphabetically".