It's bad to lie to people with a fake review.
Darren received a free leaf blower from a small company in exchange for a review, but he didn't think it was a very good product.
Darren wants to share an experience with potential customers.
Darren wasn't a fan of the leaf blower, so he writes everything he disliked about it.
Darren feels obligated to write a glowing user experience because it was a free product, so he writes one up.
When potential buyers read Darren's review they decide to avoid the product and saving money.
When customers purchase the leaf blower they are all disappointed.