Quote - As for the language style, it depends on which seat in which room you occupy to hear the words.   A seat in a seminar will do just fine;  a photo chat with a casual passerby will not.

I have to disagree with you here. If I were sitting in a seminar this guy was holding (and he is a university teacher IIRC from his page) he would have lost me after the first two paragraphs. IMVHO teaching should be about making your point - and making everyone understand why you make that point, and your reasoning behind it. It should not be about waxing poetic on the point you are trying to convey, and thereby obfuscating your meaning. But your point about the Vietnam war images is a very good one. I had one of those "never more" posters on my living room wall for years, and I highly doubt I would have kept it there for so long if it had been a color picture. :-)