So if the receiver gets blown up, you treat it as PF hit on defenseless player instead of KCI? I like that.
Well, for targeting, that takes forcible contact to the head-neck area, with an indicator (such as lowering/leading with head/shoulder, a launch, or a thrust. The contact could be violent, but as long as it isn’t targeting, or a striking action, it is just KCI.
For clarity, the description immediately above is for targeting on a defenseless player, and a player attempting to catch a kick is one type of a defenseless player. Additionally, targeting can be of the "spearing" variety, in which the attacking player makes forcible contact with an opponent - defenseless or otherwise - with the crown of his helmet, to any part of the opponent's body (not just head/neck area). That penalty, too, would be added to the end of the run/try/kickoff/succeeding spot.