Strategic blocking helps maintain a healthy selling environment by filtering out high-risk users. Sellers typically add users to their list for reasons such as:
Buyers attempting off-platform deals or other manipulative scams. blocked buyer list
If you cannot find the option to leave a review: where this is a frequent question).
Since you did not specify which platform you are using (eBay, Amazon, Etsy, etc.), here is the most common answer based on how major e-commerce platforms handle blocked lists and reviews (specifically eBay, where this is a frequent question). blocked buyer list