The biggest culprit for not linking to sources, according to Anthony DeRosa at Reuters, is not blogs with all of their aggravating aggregating, but the Old Media.
Apparently the New York Post is a common offender. The Post has gone so far as to have allegedly admitted, by way of correspondence from one of their reporters, that they in fact have a policy to not credit blogs (or anyone else) if they can verify independently after they’ve been tipped off from the source they choose not to cite.
This strikes us as very bad manners. As a blogger, one learns pretty quickly that if you forget (or wrongfully deem it unnecessary) to include a link, the author of the source will notice, will tell you, and you will feel unprofessional/foolish when they do so. Best to avoid it altogether. The only ones who apparently get away with this are old media outlets. Writes DeRosa:
Even here at Reuters, links are rarely seen, if ever, in the context of the articles we post. Felix Salmon recently referred to the Wall Street Journal as “the kid in class with his arm around his homework” in reference to their refusal to link. The New York Times is just as stingy with their links…
We highly doubt these practices will last long. More and more we hear about original sources standing up for their right to be linked, and this relic of pre-digital reporting culture will change, and change rapidly.