You know you can buy replacements if it leaves an outline that is visible? On my 2007, I removed them after 7 years. No outline on the red paint.

 

if the truck sits in a garage most of the time i wouldn't worry at all.

 

Yes, same here, my ruby red was almost 2 years old when I took the "SPORT" stickers off of the rear quarters. I did it on a hot sunny day when it had been sitting in the sun and just peeled them off without any additional heat, they came off clean accept for a bit of residual around the edges, that came off with a bit of goo-gone, a quick coat of wax and it was like it never happened. I love the way it looks super clean without them. I also removed the little chrome "flexfuel" badge from the tailgate, I think it took longer to get the 2 sided tape off from that bugger that to do the rear quarter decals lol