But more importantly, I find the real risk isn't in what/how they are reporting and being aware of the slant, but rather in what they are intentionally not reporting on. The issue at its core is information asymmetry. No one individual can stay on top of everything going on in the world which is why we rely on information sources to sort it out and keep us informed. But they can't be trusted - any of them. They all have agendas and biases. The only way is to expose yourself to information from multiple sources with different opinions so that you can, hopefully, wade through all the bullshit and actually get to the facts.
Also, with something like gadget reviews, you can close that information gap by purchasing it and testing it yourself. You can easily determine if someone is full of crap. You can't easily do that when it comes to politics and world news. And the risk to society with our current media/news system is extraordinary. People follow the sources that they agree with and it becomes a bubble for them that they live in. Those sources rarely ever introduce anything that goes against their narrative grain so you get a positive feedback loop where people's opinions are strengthened simply because of the information they choose to consume. It's like how so many people on Twitter and Facebook couldn't comprehend how Trump won because they 1) don't associate with anyone who supported him and 2) they only followed people with the same political beliefs - so they had no idea what his true support level was.
/rant