I've worked as a bartender and lots of young people work in hospitality for their first job. We have literally fired or not employed people PURELY because of their weird, overbearing, obsessive helicopter parents making it not worth the hassle to keep them. You wanting to be able to call the boss of your now adult child to check up on him is literally insane. It's something crazy people do. It's highly inappropriate and not to even get into how absolutely humiliating it'll be to you, again, ADULT child. If you keep pressing this, and going down this road I promise you that pretty soon, you won't have your child's phone number, let alone any co-workers of his. YTA GO TO THERAPY!