Can takeaway merchants block customers?

Takeaway merchants can block customers on some platforms. For example, the Meituan takeaway platform provides the function of shielding customers, and merchants can shield customers with malicious bad reviews in the background operation. Interception of malicious customers is aimed at customers who are maliciously harassed. Merchants can block such customers in the "Online Contact" page, and will no longer receive messages from this customer after blocking. Customers blocked by merchants will also be monitored by the platform.