First upload.

Features:

• Crush any block.
• Blocks drop their natural drops. (i.e. coal ore drops coal not a block, stone drops cobble.)
• Visual and audible indication for blacklisted blocks. (smoke and crash)
• Crush up to 11 blocks at once!
• Very light plugin. (no lag)

Could be used to grief. Can't crush obsidian. Needs a air space behind the crush block.