Plastic Thingy

I just got a new phone at work. On the call screen at the top they left on the flimsy plastic sheet to protect the screen. I appreciate that. I also took it off the first second I got it. I see the screen better without it and it looks nasty when you keep it on. However, I noticed a bunch of people just leave it on. I don't get that. Why leave it on? It looks hideous. Take it off damn it, take it off! Are you too busy to just peel it off? What's up with that?