It is mostly for... what do you call it, memorabilia or something. When I download a game from Abandonia, if I really like the game, I will download the manual, music, walkthrough, box scan, etc. and not just the game. Maybe it's just my way of *immortalizing* the game for myself. I do not print the .pdf into paper, just burn the .pdf file along with the game and all other things mentioned before to a CD-ROM. And yeah, it would be great to be able to show them to kids in the future
As for mobygames, if I really like the game that I download from Abandonia, I even go to mobygames and print additional info from there too. Add info from Wikipedia as well, if I really like the game. Maybe it's a collector obsession
But as I said, if it is too much trouble (and I can imagine it is not simple to change the program), then forget about it.