[nmcfarl]

Scope matters.

It’s quite different to assume that people can look at the outside of any particular letter, than it is to assume that people are building a database of all your mail, and doing social network analysis on it.

The results of the 2 actions are radically different, with radically different amounts of information gleaned.

[devindotcom]

Isn't that rather like the argument used regarding the JSTOR data, which we all rejected vehemently?