From an outside perspective of someone who's never been a JW, I have a hard time understanding how voicing what ever it is you want to voice in a destructive mind control cult ritual, would be considered rude or disrespectful.
That being said, the way they chose to go about it is in a sense making a mockery of not only themselves, but the seriousness of the harm the cult causes. The end result does give the WT the upper hand.
There was a man who went inside Kingdom Halls protesting against pedophilia. The way he did it was powerful and had the ability to make an impact in my opinion. It certainly left me in tears after watching those clips. I agree with posters who say they should have chosen a more powerful stance versus teenage antics.