Sadly this sort of conduct just makes the "faithful" more determined.
It doesn't show dignity, and helps them confirm their thoughts that "apostates" are "mentally diseased"
There are wiser, more dignified ways to make a stand.
What he said would have made me think. Even when I was fooled, I was still very curious about what "apostates" had to say. It would have made me think, what he had to say. Also, I'd have pondered the guts it took for this man to stand up and do what he did.
Dignified? I suppose he could have said, "Excuse me please, but....." If you hand someone literature, they don't have to read it, but if you say one profound thing, they cannot unhear it.
Me personally? Unless it was for a funeral or possibly for a wedding, I won't set a foot on a KH property again.