You’d want to define ‘real life name’ for the anonymity bit. I don’t post under my legal name and don’t think it’s possible to find it given my chosen one, but I go by my chosen one rather than my legal one in most cases, and it’s actually possible to find my address given my chosen name and a bit of googling, which feels more like 1 or 2 than 3 to me.
You’d want to define ‘real life name’ for the anonymity bit. I don’t post under my legal name and don’t think it’s possible to find it given my chosen one, but I go by my chosen one rather than my legal one in most cases, and it’s actually possible to find my address given my chosen name and a bit of googling, which feels more like 1 or 2 than 3 to me.