I'd probably not use such a thing, as my photo enjoyment in those hands-free moments is always done off-line, using the freeware Irfan Photo Viewer, where pix can be viewed full-screen and the easily-prodded keyboard cursor arrows ↓ or → give the next photo in the folder when I'm ready for it.

Irfan can be set up so that all pix automatically fill the screen.

I think whether or not NBN gets an option depends mostly on how many people on NN want or need it. For instance, a "sin bin" for web-stealers isn't really necessary there, as there's easily enough mods to stay right on top of the problem, and make such people get tired of doing what they do.

I would have liked a sin-bin, back in the summer, but I felt it was no use asking for one.

I'd have thought a 'slideshow' option for those with a photo Gallery over say 50 pics. would be a good idea !