It's really not that difficult a skill to build though. The trick is not to get perfect at detecting sarcasm or trolls but to realize that if you're talking about an individual or a minuscule group of people online (like the 57 members of the "bounty hunter ring"), it's almost never worth paying attention to regardless of its trolling status. Best-case they're trolling, worst-case they're a little nuts and talking shit. Even in the worst case, "I found an infinitesimal amount of nutty people on the internet" is not useful information for either a journalist or your personal model of the world.
I'm serious, it's really, really easy not to get taken in by bias-confirming dumb things. In fact, there's a force running counter to your framing, in which the average person has _less_ excuse to be taken in by trolls. Journalists have an economic incentive to jump on a story, while an individual is free to avoid having an opinion until there's enough usable information to shift your priors.