It's hard to judge. When I started seriously participating in stuff online, I kept heavily pseudonymous so I could disavow it later (I was still growing up) and out of interest in crypto & security issues. This came in handy when I earned some enemies on Wikipedia who sought to 'out' me; one group went so far as to call up universities looking for info on me in order to harass me and in the best-case scenario, get me fired from a job. Naturally, they failed. More recently, I learned of death threats; I believe the threat to be very minimal, but it's still not a particularly happy thought.

The point being that when I started, I didn't seriously expect stalkers and threats, but if I had started 'public', I didn't have the option to retract all the relevant privacy info.