Don't Fuck With Your Own People

Seems like a reasonable rule of thumb:

A few current and former signals intelligence guys have been checking in since this NSA domestic spying story broke. Their reactions range between midly creeped out and completely pissed off.

All of the sigint specialists emphasized repeatedly that keeping tabs on Americans is way beyond the bounds of what they ordinarily do -- no matter what the conspiracy crowd may think.

"It's drilled into you from minute one that you should not ever, ever, ever, under any fucking circumstances turn this massive apparatus on an American citizen," one source says. "You do a lot of weird shit. But at least you don't fuck with your own people."