Actually, yes, it happens everywhere. most of the time some people believe in their own beliefs and get too hard headed and shallow to even process that not everyone has the same beliefs/practices that doesn't mean they're right nor wrong just different. like Atheism & Christianity; its a huge topic people discuss that usually always turns heated.
the answer is The right to privacy is implied in several constitutional amendments.
Well some people do that to intertain the watchers as well as teach them that way they can help younger people learn history so that they don't forget important events.