2.
Nope... Not Me
Your answers suggest a deep distrust or dislike of all things related to social media on an instinctive level. There's absolutely no problem with this, but it is important to realise that, whether we like it or not, social media is part of the world today and if you are not using it and haven't invested time in working out the cost of not using it, you are probably losing opportunities and reducing your competitiveness.
Having said all of that, if your business is thriving and you have a steady sales pipeline, you may not need to enter the fray.
What you do need to accept, however, is that this situation may change, for example, you may find yourself needing to find new ways to generate sales enquiries or you may have others bring your business reputation into question on social media. Do review the situation regularly and if you feel it is worth investigating...