im a big fan of skyblock , and i know this would be helpfull in //server/Bukkit/plugins/Essentials/config.yml enderman-pickup: false when you dont have mobs under control , losing dirt is painfull when you dont have a rank for the skyblock world of course , not global
Im pretty sure there are some items that endermen cannot pick up and I think spawners are one of the items, Support never the less