Currently mods can bypass maze blocks and break them, in the past 1.7.10 versions Blood magic bound picks were used to abuse the maze blocks with right click.

Right now I am working with a mod called Prefab that has premade structures you can place in the world, it has a built in block to the user if the BlockEvent.BreakEvent is not allowed and I wondered if you could block it in mazes?

Steps to reproduce:

1. click with a house, and it obliterates the maze blocks.

What I expected to happen:
the event is denied and the house is not allowed to be placed.

What happened instead:
Brian-Wuest/MC-Prefab#61 (comment)

I don't think that maze blocks are unbreakable.

Maze Blocks can be broken, but the time taken by a normal pickaxe takes a long time. This is because of how one can obtain a Mazebreaker pickaxe in the maze, and also because said pickaxe is used to create shortcuts. It's less Maze Blocks are unbreakable more it takes a long time to break.