Heading Is Good,
Why CAS?
Because its not the first time that a bugsmasher decides to fly through the ILS onto 05 at 6 or 7d, not talking to a soul, causing all sorts of involuntary reactions on the flightdeck!!
Not illegal because its class G and theres nothing to stop them doing it. Not good airmanship, but we aren't all blessed with that are we?
There are a lot of homebuild's in the area without transponders, which as RADAR says above, would make it impossible for the radar controller to provide protection to IFR traffic, esp. when established on the ILS.