Yes, i know my title is really weird, but to the point: Someday i build parkour on our fun server with friends, and one of my friends can boost with any block to the top, even on spawn. My video bellow too see more: Server informations: Minecraft 1.8 worldguard 6.1 worldedit 6.1.3 Bukkit My question, how to fix it?
Clear inventories, disable interact. Use Aparkour, it disables even placing blocks when you start the parkour.