Do We Have Anything Here?

[Theisey]

Yet another play I'll put into my own list of plays that are called unfair acts! If the NF could list all this kind of stuff, they would add another page or two to their books.

Yes, I would flag this as a UC and I'd kill the play at that time.
It fits the commentary you'll find for CB 9.9.3 Sit B. I'll repeat it here.
... actions or verbiage designed to confuse the defense into believing there is a problem and a snap isn't imminent is beyond the scope of sportsmanship and is illegal.