I am sitting here trying to put a ruffle on the punk soaker pattern myself. I gooogled ruffled edge and came up with picking up 4x the number of stitches you want, then K2tog for the first round, K2tog for the second round. I did it, but in binding off, there was no ruffle, rather the BO edge was too tight. So I frogged it, and figured I would try searching here.
I too found the crochet idea, but I don't know how to do it. If you come up with an idea that works, can you please let me know ?