RE: New Milestones: 4k Account Tokens and 80 rep.

but I can imagine I'd do that less often to avoid lowering my reviewer score.

This assumes that your score as a reviewer would go down for posting a poor review.
Inherently doesn't this assume that the 1-star review was incorrect and you shouldn't have done it?
If the one star review was warranted then your score as a reviewer should go up within such a system.

very low quality blueberry pastry

So you give an entire establishment with dozens of products a one-star review because of a single item?
Again, maybe this is an infrastructure issue.
Perhaps the ability to review only the blueberry pastry should be a thing.
Obviously that review is worthless compared to someone that's been there dozens of times and has tried everything.
Just saying.