One of the best ways to know if something has artificial reviews is to check out the reviews that are on the first page. More and more, especially with electronics, reviewers are getting more vocal about shitty products, and it's saved me from just relying on the fact it has 14k reviews and like 4.5 stars. People have gotten better about upvoting people with the real talk.
I stopped buying from Amazon because pretty much everything that popped up in a search was crappy chinese products with clearly fake reviews. Even after this I still don't trust Amazon to do the right thing though, they knew about this and let it go on. I purposefully avoid them because of their bad faith acting.