The only problem with that is the leftover toilet paper. You can't put it in the urinal, so you have to put it in the trash. That would cause the trash to fill up quicker.
Dividers? Oh, then you'd love the Trough o' Urine. Shoulder-to-shoulder while you let it flow into one big long shared container, no hang ups allowed, and no peeking. Available at finer concert venues and race tracks (and Washington state ferries, as I recall).