This is more about avoiding having a digital identity. I recently created a second Twitter account to create some separation between personal and business interests, conversations, etc.

Not that I want to have two identities, but I would like to be able to distinguish between them. It was not difficult, but required some effort to create separation (I didn't want twitter suggesting my "business" account to my friends I already followed on my personal account).

Facebook was another story. I have never had a Facebook account until a couple of weeks ago. I took on a new hobby recently, and the most active community around this topic is exclusively on Facebook. I joined and immediately disabled the ability to be seen to the extent I saw possible. But then Facebook disabled my account within 24 hours – the irony! They allowed a review process, which required a selfie (they clearly know my identity through facial recognition, despite having never supplied a picture myself). They let me back in fairly quickly. But I hate having to "support" the ecosystem. And it turns out I cannot friend anybody without allowing their friends to view my account.