Yes, I went and did it, I knit ruffle scarves as per the current trend. And, they are adorable. Maybe not quite my thing, but I think I need to make more, of different yarns, before I find "mine".
With the pink one, I used the thick edge of the ruffle yarn. This was the first one I made, LOL. On the Red Heart Sashay (the scarf on the right), the thick edge has a glitter strand, so I quickly realized I had made the first one wrong ("Starbella" yarn). I also thought it seemed a little wide at the end, so I gradually decreased the width until I was getting low on yarn and then started increasing again. This makes the scarf narrower where you wrap it around your neck. For the right one, I also made the ends more dense with the ruffles, and less dense through the middle.
I like the idea of the background yarn; it'll make the scarf warmer for winter, and perhaps lessen the "growing" issue I've heard about these scarves. It also allows me to vary how wide the scarf is as I go along, as well as how thick the ruffles are. And it uses up some small bits of other yarns!
Pink one: 133gr; beige/grey one: 113gr. The ruffle yarn is 100gr in each case. The pink one is quite a bit longer (and less dense) than the brown one.
These scarves are posted for sale in my shop!
Yarn In: 17 741gr
Yarn Out: 246gr + 13 501gr = 13 747gr
Balance: 3994gr more brought IN than used
Costs: $420.20 /298days = $1.41/day