So I log on today to my private smp with my friends and to my surprise they're all shouting! Enderdragons are being randomly spawned destroying everything on the over world, difficulty is randomly changing, and people are being randomly oped and forced to switch gamer modes! PLEASE HELP! I only have essential chat, essentialsX, luck perms, and vault plugins in my world. My friends are saying they saw nobody join the world. Please I really need help...