I read (perhaps misread) as being right before/as he kicks it.
If it's earlier than that, I agree--don't blow the whistle for the kick. Talk to or caution the miscreant first, and then take the kick.
I think the reality is that it extremely rare for someone to do something that interferes with a PK enough to pass over the trifling bar. (I don't recall ever seeing it, though I have cautioned for verbal distraction a couple of times while the ball was in play.)
