They should throw the book at him
"We couldn't find anyone who could get me to that altitude. No pilots were willing to lose their license to fly me into controlled airspace."
A good clue that what he was wanting to do was illegal.
"We went as far [as] to consider bringing a Mexican into the country as a temporary worker to fly the plane. That's when we turned to helium."
Evidence that, even though he knew it was illegal, he was willing to go ahead with the stunt.
"Sometimes you've got to live life on a limb if you truly believe in your company"
So he's happy to risk his own life; fine. But what about innocent lives? Controlled airspace is there for a reason; the chances of a collision may be small but the consequences would be terrible.