Progress/ Problems on Dad's Scarf

I've made a good bit of progress on my dad's scarf. It's about a third of the way done, maybe just over, and it's a ribbed stitch scarf.

I was kind of expecting the scarf to want to roll, so the edges are garter stitch to try and prevent that. But I guess that's not enough, because as you can see above, it is still really convinced that it wants to roll. I'm thinking of picking up stitches across the bottom and knitting a garter stitch border there, too, but I'm a little afraid that will make it look goofy, and that it just won't help that much.

But since the bottom is doing that anyway, it probably won't hurt.

I also chose the rib stitch because I kind of thought that it would want to roll less that a plain old stockinette. Maybe it's that the ribs are so big (4x4 on US 10 needles) that's really allowing it to roll, or maybe it's just the ribbing, but it is rolling, and I'm pretty disappointed.

It's a little hard to tell here, but these are three of the ribs obscuring the other two with the garter stitch borders.

Since it is acrylic, blocking is going to be a bit of a trial, although I just may try steaming it, and hope I don't destroy it.

Any suggestions on how to unroll this scarf would be much appreciated!

Happy knitting!