As long as you don't call it instruction (particularly in YOUR log book), you don't have to touch his.Disclaimer: I never checked to make sure my dad was a US citizen or marked in his logbook, since I knew where my dad was born, and his parents, and his grand parents...
Hey TSA, gfy.
As long as you're not training him for an initial certificate or to add a rating, you don't need to concern yourself with the TSA.
Profanity (even obscured) doesn't improve things.