Disagree. I leave lots of legit 5 star reviews on things as do others.
As someone who's had PayPal not only lock my account, seize money that was in it, but also forcefully take money out of my bank account and credit card to reimburse a fraudster, I disagree. PayPal is scum, and is just as apt to protect scammers as they are buyers. Been there, done that, got the Tshirt.
What I do with anything dodgy is to use my Stack Mastercard. It's basically a prepaid credit card with an online portal/app on which you can load money (conveniently using Interac etc, they're Canadian) and use that. It comes with a physical card as well if you want, but the app also provides a "virtual" credit card number which is the one I use online.
Best part is that you can "Freeze" the cards instantly via their app, so for some online purchases where I don't want to use my real CC I load money onto my Stack account, unfreeze the card in the app, process the transaction, and then immediately go back into the stack app and freeze the card again.
I use the physical card for things where I also have a level of skepticism that the card might be skimmed or whatever. Not only do I never keep much money in my Stack account to begin with, but with the card instantly frozen after I use it, it's useless to them anyways.
Works awesome and presents zero risk.
One of my own personal tidbits is...if you're ordering anything from the USA and UPS is the only shipping option, run away....far, far away. Anyone who's ever been stung by the UPS brokerage fee nonsense knows what I'm talking about.
And on the topic of Amazon reviews, checkout FakeSpot - you just dump an Amazon item URL into it and it spits out what almost always ends up being the items "real" rating with all the fake junk separated out.