I actually avoid the reviews with photos as 99% of the time they end with "I got this product for my fair and unbiased appraisal" or somesuch.

I've never quite got around to writing a browser plugin that excludes any review that have such a statement, and / or builds up a database of reviewers that are trustworthy on amazon.

The guys in the Top x of reviewers, who receive all this crap to review, basically it's their living, they aren't going to start bad mouthing it.

Maybe take the star rating of each review within a month of a new listing and then compare the average 6 months later to see how shill those initial reviewers are.