My query would be do you fall in the prewash camp? If so don't worry about it, look at all the selvedge quilts Karen Griska has introduced and spawned.
I used a ton of selvedges in last years Bonnie Hunter mystery in the strippy blocks, and they are all fine. But I'm a prewasher.
That said I've never seen a selvedge shrink up in 40 years of prewashing. That is where we'd see it first. This might be an old myth. I do know with hand quilting they are a little harder to quilt through.