Cop, "Are you part of the demo? If so get behind the barriers".
I have a strong dislike of barriers.
Cop, "You had better leave or they (the protesters) might give you a good kicking".
Because I was taking photographs? The protesters had loads of media and police cameras with long lenses trained on them anyway! Double standard?
Me, "Why do the police keep questioning me? Do I look suspicious or what?" I said, "There is no law against taking pictures'. "What about the tourists, they are taking pictures?". What about those people (the media and office workers) hanging round?"
Cop, "If you don't keep moving I'll arrest you for obstruction", came the reply.
Obviously, a very different sort of law from normal applies to me, so I left.