For me, it is people who check out an old routine, see a big difference in the composition compared to today, and instead of researching why or asking about it, they just go ahead and dismiss it because of that. You're watching a classic and beautiful bars routine that scored very highly and then a comment underneath says 'Ehh she didn't hit all her handstands, didn't deserve that score. Nastia is better'. Instead of the perfectly acceptable 'Oh were perfect handstands not a requirement back then?' or something. Okay so Nastia doesn't appear in all of those comments but they are quite common and plenty cite her...anyway that's my only issue with youtube comments. I totally gloss over personal wars gymnast x versus y, so they never bother me.