I like upvotes as an expression of agreement because it gives an indication of the truthiness of the comment (wisdom of the crowd). If someone says something in a field I'm not familiar with, and I don't know if they're right or not, I know that the following will occur:
- If they're right, people will upvote.
- If they're wrong, people will either downvote or reply stating why they're wrong.
And since I don't think any of us want comments like "I Agree", upvotes are our only option for providing a vote of confidence in a comment.
As a side note: truthiness, as defined by Colbert [1] isn't something that a crowd can tell you. It's something that only your gut can tell you. And my gut says that your comment wants a burrito.
Url?
Here is a previous HN discussion on comments [1].
And I'll save you the trouble of reading through to an even earlier discussion[2] where PG weighed in to say "I think it's ok to use the up and down arrows to express agreement." But this was on a different topic regarding troll-like behavior, so it's not entirely clear what his thoughts are.
But a person is going to use their up votes to mean whatever they want them to mean. If you want to up vote in agreement, go ahead, no one is going to stop you. I only up vote things I agree with if I think it adds to the conversation. So while I thought the linked video was impressive and a great way to see the product, I'm not going to up vote a comment that doesn't add much. You are free to disagree.