Well sir, I think it's time you borrowed a harlequin shrimp. :-)
Grim, I only report what I read and observed myself first hand. My first step is assuming the information is complete BS and then testing for myself. Blame it on my job for that mentality. Haha.
May also check for nudibrachs. I had the same issue thinking it was the asterinas too. If you don't have any ornamental starfish in your tank a harlequin shrimp will clean them up real quick!