The bans don't appear to be copied from one instance to another by the software, if that's what you're asking. What the previous poster was likely referring to

The bans don't appear to be copied from one instance to another by the software, if that's what you're asking. What the previous poster was likely referring to is the 5-10¹ instances that are banned by most other instances with the reason "allows controversial content" or "Free speech zone"². ¹: the number banned varies from instance to instance, but it tends to be the same ones. ²: this one was used by an "anarchist" instance that appears to have more rules than most other instances.