Wow this has reached 5 pages, Im surprised. Its not really complicated, these people were acting like pricks and were arrested for such. Its not like the civil rights movement, where an entire race was being treated cruelly. This is a simple case of of "dont dance here" and "fuck da POLICE". Usually Im on the side of the latter, but the dancers are just being annoying pricks in this case. The cops even asked the demonstrators to stop several times.