Its nothing new. When the SE was standing, and coppers mingled with the crowd, it was always good natured and friendly, (we always had the same ones in the same patch). Once or twice I have seen a United fan wearing the coppers helmet and he, in turn had a United hat on.
I thought it was great, it demonstrated a cameraderie between the authorities and the fans, a friendly atmosphere and, for all the distances involved, how much the United fans were so well behaved and "adopted" by the locals.
Even the UEFA "overlord" on the night, told the press that he had been delighted with the behaviour of both sets of fans; exemplary, he called it and how well everyone, the authorities, locals, fans all got on so well, he called it a major success for english fans.
Moscow, for all the doom and gloom, was a major success from that point of view.