And then there's the pirate stations!
Pirate stations would be something similar to a podcast or YouTube channel in how seriously the average person takes it. Sure, people in the know would trust KSAF, but if it were important, wouldn't NBS or NewsNet cover it? There are massive real-life news stories that are broken every day, but no one pays attention because they get all their news from between one to three sources - ABC, NBC, CBS, Fox, CNN, NPR, Clear Channel, or their local newspaper (which is probably also owned by a conglomeration). All of these except NPR live off advertising funding, which is also corporate.
Now I'm not trying to make a political argument or anything else, just pointing out that this is how our real world is set up. The Shadowrun world is supposed to reflect that by exaggerating the evil potential. ABC is owned by Disney, which has consumer interests. In the Shadowrun world, do you think they're going to report that the new Mickey Mouse dolls were made in sweatshops with dangerous materials? However, CNN (owned by Time-Warner) would be glad to report it...but not so much that it makes people want to look at how they're producing their Tweety Bird dolls.
But when someone posts on YouTube about the sweatshops and radioactive materials and everything else, what do you think will happen? Someone will see it and share it with their friends? They'll send an email through -- oops, Time-Warner owns Roadrunner Cable Internet, so the site's blocked. Maybe post it on Myspace -- wait, they're owned by NewsCorp who owns Fox who takes advertising money from Time-Warner, Disney, etc. Oh, and the YouTube video just went down because it's owned by Google. And say you did manage to see it somehow. None of your friends can see it because they use Roadrunner, AT&T, or some other large corporation for internet access, so they don't believe you. Even if you manage to show them, they'll respond with "Why isn't ABC/Fox/CNN reporting this?"
That sounds outlandish using those names...but find-replace "NewsCorp" with "Ares", "Google" with "Horizon", "Disney" with "Aztechnology", and "Time-Warner" with "Renraku" and you have a nice little Shadowrun conspiracy.