So if I see a guy about to walk over a cliff, I should just respect him and do or say nothing?thus giving them respect as fellow human beings.
Remember that guy isn't just going to die, he will be tormented forever. Most people wouldn't mind some disrespect if it kept them from harm.
People keep talking about all those people headed for hell on judgment day pointing their finger at me or you and saying "why didn't you warn me?" I guess we will just have to say "I didn't want to violate your free will or disrespect you."
I had a friend one time who asked his pastor if it was okay to pray to God to get a new fishing tackle box. I don't know what the pastor said right then, but that Sunday he said something like "People, everyday people are dying and going to hell, and here we are praying for fishing tackle box's!"