It's been a cheerily good spring for FOSS fans here in the Linux blogosphere, so we may perhaps be forgiven for our utter shock and disbelief at the affront recently committed against us by a certain brick-and-mortar purveyor of books and magazines. Yes, that's right -- it's Barnes & Noble (NYSE: BKS) Linux Girl is referring to; specifically, its decision to yank the very excellent Linux Format magazine from its U.S. shelves -- apparently because of a cover story on the topic of "hacking.""We've just learned that issue 154 of Linux Format, the one with 'Learn to Hack' on the...