It is kind of funny that the movie makes it seem like this is just too horrifying to not be hidden under a mask:
It's almost an insult to real life burn victims who don't cover themselves. Hell if RR really looked like that he was probably just a wig and a pair of sunglasses away from still being considered "cute" or at the very least tolerable when you take his "charming personality" into account.
Now Darkman? That mother****** needed to wear a mask. You'd think for that with Deadpool's super Xtreme hard R rating that they would have made RR look worse.