Most of us know the difference between legitimate questioning of posted links and patterns of simply attacking the messenger rather than confronting what's being said.
Speaking of patterns, why do ostensible protectionists post from sources such as E.P.I., Common Dreams, and various Nader-affiliates? Personally, I think it's simple intellectual laziness . . . and if somebody chooses to post something by a former Clinton economic advisor that they lifted from the website of the only true socialist in Congress, you'd better darn be sure I'll point it out. Again and again.