The discussion about whether to block ICMP (Internet Control Message Protocol) highlighted various opinions from different stakeholders in network management. Key points noted include the ISP's view that ICMP is essential for troubleshooting connectivity issues and service monitoring, while a SaaS Engineer argued for its availability to monitor services without accessing a dedicated status page. A sysadmin mentioned that having ICMP enabled can assist with ISP communication during technical support inquiries. On the contrary, a residential user humorously noted that many home routers might already be blocking ICMP by default, possibly due to security configurations or misconfigurations related to botnet vulnerabilities. The overall sentiment seems to lean towards keeping ICMP enabled for better network diagnostics, despite the debate over security concerns. Additionally, the comments touch on broader network management practices, with a mention of blocking other ports and services which may disrupt network functionality.