I think any sort of social aggregator will always have this as a challenge it wrestles with.

In my opinion, the onus of applying critical thinking when reading comments/sources lies with the reader.

When a very large upvoted comment takes places, I personally comb through some of the replies to see if anyone has sources/background that might be contradictory (and then I’ll review myself for my own opinion). It’s extra effort but I only apply this things I’m “vested” in.