I'm not sure if this is just me, but it drives me nuts when I see someone answer a question (for example in the questions section on an amazon product page) to just say that they don't know or they give an unrelated answer.
For example:
Q: Do these headphones support bluetooth and wired connections?
A: I'm not sure, but my grandson loves these!
The same goes for posts which ask a question on other sites or reviews complaining about a product, despite it doing exactly as advertised. Idk, maybe I should have posted this on unpopular opinion.
Many of the online stores I shop at have offers like "leave a review and you'll get a coupon for your next purchase", so they get a lot of pointless reviews like "It arrived. Didn't try the product yet. 5 stars"
I find that there's a very strong correlation between the average age of the customer base and the uselessness of the reviews.