Like, if a judge comes into a courtroom and you are asked to stand, and choose to sit or kneel in protest. Your protest may seem like freedom of speech, but could may lead to being held in contempt of court.
If a bride walks down the aisle and rather than stand you sit there, or kneel instead, in a way that makes it known you disapprove of the wedding. That may rub people the wrong way and I bet you would be asked to leave.
Not so much kneeling itself, but taking a time honored tradition or sign of respect and blatantly doing the opposite. Personally, I think acts like that kind of make a person look like a jerk.

[Post edited by rjk1983 at 10/22/2017 12:44PM]