Before I can offer any more opinions:
Where were the quilts?
Were these quilts hanging on a wall?
Were they on beds?
Were they folded up on a couch?
You made a comment about them being on "dirty floors" -
I would guess that the boys would have chosen to sleep on carpeted floors - my quilts don't get dirty enough to need washing after spending a few hours on my carpets.
You made another comment about "stinky teen-age boys" -
Why did you say that? They may have been, but are you sure?
Were the quilts neatly folded up?
or
Were they in wads on the floor?
If the kids had removed quilts from walls and used them, I would definitely be upset.
If they had removed a white quilt from the guest room that no one even breathes in, I would be upset.
If they were just in wads/piles/tossed, I would be upset.
Need more details to know how much empathy I might have for your situation.
And we still don't know if they were damaged in any way.