[munchbunny]

If the ratings scale is 1-10 and all of your ratings are 1-5, does that mean you only give reviews to things in your 1-5 range, or does that mean everyone else's 10 is your 5?

From a perspective that is external to your inner monologue, I have no way of knowing. Even if your criticisms are valid, I know too many people who seem to never talk about the positive parts to know whether you're just perpetually unimpressed. Or, more likely, you're the type that never talks about the nice parts. I'm guessing this because of your comment elsewhere in the tree that specifically asks why one should compliment when something is doing what it's supposed to do. (The answer is that people usually look at reviews for confirmation that X is as advertised.)

Or there's actually nothing redeeming about the subject of your review.

So yes, taken in context I would end up throwing your opinion away. In practice, I don't check every reviewer's review history, but maybe that would be a useful signal to see.

[gowld]

The honest opinion of a stranger is useless.

A summary of the opinions of many strangers has some signal.

The facts of a stranger have some utility.