If I could reply to that ... straight-up-and-down and without fear (which BTW I don’t have) of “downvotes” ... my very simple reply would be this:
“It does not help me at all,” because:
- I have no idea why you did it. (Do you object to the content, or to the author, or are you (were you, five years ago...) just having a bad hair day?)
- If I am searching for this thread, three years hence, your “(up/down)vote” adds absolutely no semantics (tags, attributes, etc...) to the thread.
WikiPedia might be the best illustration of what might usefully be done: a system for commenting about the content, expressed as categories that can be tabulated. A “vote” is merely a number, unless it is paired with attributes and intended to be useful “for years to come.”