Lecture him about doing what correctly? Tell him how to fly an illegal airplane, better fake a plane crash, cut up the plane and throw it in the trash to cover it up, lie to the FAA, break regulations, potentially endanger people's lives, and lie to millions of people about it for views on YouTube? Then pay for the $100 in fuel that he spilled, that can't really be cleaned up anyways? This guy already has no respect for anybody, what makes you think he'll listen to a "stern lecture?"
Don't do victimless crimes. If you have already done it, don't cover it up. And if you have to do it all, don't do it stupid.