Well, yes, I have! I made a black and white quilt and had left over 4-patches. I figured it would be pretty easy to make a few more and use them as borders with jelly roll strips in-between. Think they were 3.5 or 4" finished, can always pull it out and measure.
While the change in width really didn't make any difference, keeping the black/white grid of those 4-patches made it significantly harder than it needed to be... I think with multi-colors it would have been fun and fast and slap dash instead of the thought process it had to be.
So the pictures are "Black and White and Red all Over" and the original, "Not Everything is Black and White"
Edit: here's a detail of the corner.