Unfortunately adding pictures to that results window or adding mouse-overs to check NPCs during the day would be difficult additions this late in the game's life cycle. I agree though, if I noticed that problem earlier, I would have added something for it.
Keep in mind the prank calling mechanic is really random since it targets a random person in that rank every time (so if you target accountants, only one accountant out of 8 will be chosen each time). I'd only recommend using it if you have a couple of targets left. Otherwise watching TV is the best in the early and mid game.


