To treat someone solely as a means,
aims to use that person to get what you desire. Manipulating a person into doing what you want to reach your level of happiness. When you lie, you are manipulating someone into acting in a different way than they would if the truth be known. Lying is ruthless since it treats the ones that are lied to as a means rather than a respected being; since it makes it challenge for them to make a knowledgeable choice about the involved issue. Stealing from someone treats them solely as a means by taking another person’s belongings that you desire to have or see value in. In my opinion, when you steal from someone you belittle them, show zero respect and treat them badly.
Yes, I do believe in respecting a person’s autonomy. Yes, we should allow people to make their own decisions and choices if they have decent and rational reasoning behind them. If someone makes a decision that could put someone in harm’s way, no, I do not agree with supporting their choice. You cannot make choices and decisions for other people; only your own being. The right of autonomy permits people some space for people to make their own preferences; it does not command what those preferences should be.