Beds explode in the Nether and End when TNT Explodes is disabled.
I would think that this could be an issue for when people are attempting to troll / grief things built in dimensions other than the Overworld.

Ender Crystals explode as well but this also affects the Overworld.

To reproduce (For Bed):
Step 1. Disable TNT Explodes in Host Privileges / Options.
Step 2. Place a bed in the Nether / End.
Step 3. Attempt to use the bed.
Result: boom

To reproduce (For End Crystal):
Step 1. Disable TNT Explodes in Host Privileges / Options.
Step 2. Place a End Crystal
Step 3. Break the Crystal.
Result: (also) boom.