There should be a block banner. For example, if you dont want anyone using lava at your world, you can ban it from your world. + so theres a chance of this happening.
I hope QRious see's this. What would be awesome is that if you could make your own blocks or smileys. And to make it better, being able to animate them.! Click the Little [+] If you agree so there would at least be a chance for QRious would see this.
 "Creation"){kind=icon}
 "Competitive Line Waiting"){kind=icon}
 "Kirby's Catastrophe"){kind=icon}
 "Kirby Klicker"){kind=icon}
 "The White Dot"){kind=icon}
 "All That Matters"){kind=icon}
 "Adventures Of Something"){kind=icon}
 "VVVVVV Demo"){kind=icon}
 "Ragdoll Invaders"){kind=icon}
 "Ragdoll Avalanche 2"){kind=icon}
 "You Have To Burn The Rope"){kind=icon}
 "Star Kirby Brick War"){kind=icon}
 "My First Game"){kind=icon}
 "Just Trolling"){kind=icon}
 "Everybody Edits"){kind=icon}
 "Just Chatting"){kind=icon}
 "Blocks"){kind=icon}
 "vind cef"){kind=icon}