That is true, of course. However, the reviews offer a valuable, though noisy, si...

That is true, of course. However, the reviews offer a valuable, though noisy, signal: one star reviews uncover design issues with a product.

A lack of one star reviews (like 100% five star reviews seen in some products) point to obvious manipulation and should also serve as a red flag.

I should have said: read the reviews and use your head (d'oh!)