while I remember

At Saturday's demonstration against the EDL, while I mentioned the ire I provoked by my photographing of 3 Asian women, I forgot to mention the footnote. Although the women made their feelings abundantly clear at the time, a few minutes later one of their associates, a young, curly-blond haired lad found me in the crowd and took it upon himself to underline the points about respecting people's privacy. I listened quietly to what he had to say, then responded that I had "taken on board" his remarks, while emphasising my right to use my camera in a public place, especially in such a highly charged situation as this one.

But this wasn't good enough for him, and he continued making the same points again and again, right down to using the exact same words.
"What part of the sentence 'taken on board' don't you understand, exactly?"
"You shouldn't use sarcasm"
At this point I have to admit I more or less lost it.
"What? Now you're telling me how to express myself? How dare you!"
And as he persisted in this additional criticism, I decided to give him some material with which he could properly come to grips: I told him to go and fuck himself.