It's not the Googleability of "phyg". One recent real-life example is a programmer who emailed me deeply concerned (because I wrote large chunks of the RW article on LW). They were seriously worried about LessWrong's potential for decompartmentalising really bad ideas, given the strong local support for complete decompartmentalisation, by this detailed exploration of how to destroy semiconductor manufacture to head off the uFAI. I had to reassure them that Gwern really is not a crazy person and had no intention of sabotaging Intel worldwide, but was just exploring the consequences of local ideas. (I'm not sure this succeeded in reassuring them.)

But, y'know, if you don't want people to worry you might go crazy-nerd dangerous, then not writing up plans for ideology-motivated terrorist assaults on the semiconductor industry strikes me as a good start.

Edit: Technically just sabotage, not "terrorism" per se. Not that that would assuage qualms non-negligibly.