Mobs spawn in scaffolding

Mobs can spawn on scaffolding.

The worst idea ever > build at night. You're at 100 blocks from ground, building your tower and a skeleton shoot you on the of lava nearby. It wasn't supposed to happen.

Or a creeper blow up the scaffolding on the extension that is 3 blocks under you, than when you fall there is other creeper waiting.

Its awful building with mobs on your scaffolding