In isolation, and assuming the coach doesn't tell me beforehand, absolutely not.
Question is, what about if they did it regularly and the coach does tell us beforehand? Every third play? Every fifth play? Twice a drive? Every other drive? There surely comes a point where the offense just has to get used to "this is what they like to do sometimes", hopefully by (legally) targeting the defender who's arsing around and giving him something else to think about.
I think this is a self-correcting issue. If we beat it into submission with flags, we look petty and small-minded; if we just tell the offense to get used to it, they should be able to find a way of exploiting the disadvantage that the defender(s) are putting themselves at by rolling around, which will in turn make the defense and their coach look like too-clever-by-half idiots, and the problem resolves itself.