Headliner Ache?

I've just noticed the front and rear edges of my headliner have no trim, I can see the foam at the edge all the way across. I went to the Ford place and saw the exact same thing with a 2014 GT so it seems to be a standard thing, not like my rear seat cover which was cut wrong. Is this something to worry about?

I mean the parts of the headliner that mates up to the front and rear windows. Here's a pic of the front, not the best but hopefully good enough. It's the same with the back but pics have to be taken from inside and Blown Knee says I ain't crawling back there...