You needn't join in. You are free to segregate yourself.
Are they? You still are in same infrastructure and legal framework. Thats like saying you are free not visiting neighbouring apartments. Their "influence" (smoke, noise) is still leaking to your space. Same with web. Like facebook negatively affecting separated web forums.
You can find another infrastructure and legal framework like Project Gemini, and I'm sure other separatist protocols will pop up in the future.