I think a project like Linux Personas quite well defines the term "passive aggressive". Basically they group Linux users into broad categories (experimenter, follower, application, geek, transitioner) to help "better understand the marketing opportunities". Then they provide stats like sales cycle length, potential revenue, etc.
There's even a funky screening tool (with well worded questions akin to "do you like linux, or do you care about your IT infrastructure" to let you determine if you should attempt a sale to them.
I so wish I could say that ironically the server that runs the site is Linux, but no, sadly it's W2k3.... I guess they won't make that mistake twice :)