I'm afraid that I would have been more vocal and more demonstrative... in fact I have in the past been much more vocal when someone used my knives without permission.
I am very fussy about my knives I keep them in the best condition I can.
No one sharpens my knives but me and no one uses my knives on a hone but me. I too use a ceramic "steel" and have for the past 35+ years since Dexter first offered one.
I agree with Toliver. Soup guy can bring his own knife if he can bring his own steel.