bifurcate a patsy persona that plays by the invasive corporate internet rules for public observation and a private persona that is private and does not and just never mix the streams (two phones, dualboot, etc)

Now, none of my entrepreneurial businesses use LinkedIn, and I've never had an account there. From what I hear, LinkedIn is a pretty fucked up scene. However, sometimes one must do as the Romans do. The trick is, as you say, dividing your private life from your public/business life, and as you mentioned, never cross the streams. It's difficult because we are social animals, and it is very easy to slip and divulge info from either our private or public/business lives. Loose lips sink ships. Since my businesses doesn't require a lot of meet n' greet type affairs, it's a little easier for me.

One on my businesses deals with a branch of construction. I've found a lot of old heads with split personas. If you cold call one of them, and say you ask for 'Barney Smith'. The person will automatically assume that persona or I have been asked 'Who wants to know'. They are kind of practicing dual personas depending on their business angle which are all separate from their personal lives. It's kind of an interesting phenomenon, and it's one I've adopted.