I was using it in the loose sense of "how much effort should I put into making it difficult to ascertain my real life identity."

That is a very useful taxonomy, I may reference it in another project I'm working on analysing why people value privacy (and whether they should). The main motivation seems to be the 'icky' feeling people get at the thought of being observed, not any expected harms. Which means they are unwilling to accept small violations of privacy that would have massive social benefits (e.g. supplying police with all citizens fingerprints and DNA would massively reduce the number of unsolved crimes, with very minimal possibility for abuse).