The downvotes are because you are not adding to the core conversation. The community standard is that if you support a comment then up-vote it, and that's it. Additionally if you have something to say in response then write a comment.

Thanks. That's a decent explanation. :) I did read the Hacker News Guidelines but apparently not well enough. I definitely missed this: "Resist complaining about being downmodded. It never does any good, and it makes boring reading." Apologies, all.