While Eaglercraft doesn't use official Minecraft accounts, server administrators can ban your UUID (a unique ID generated by your browser) or your IP address. Some large Eaglercraft networks share ban databases across hundreds of servers.
From analyzing multiple community-distributed builds (e.g., “EaglerCrack”, “EaglerX”, “Reaper”), the following modules are typical: 1.8.8 Hacked Client Eaglercraft
These clients inject via browser console, bookmarklets, or modified Eaglercraft HTML files. From analyzing multiple community-distributed builds (e