[nate_meurer]

Kinda hard to do when your ceiling is covered in delicate popcorn asbestos that showers down on you every time it gets touched. This is very common.

[arcticbull]

If they're crumbling or damaged they should be abated, but if they're in good condition they don't pose a risk.

[nate_meurer]

There is no such thing as a popcorn ceiling that doesn't crumble every time you so much as change a lighting fixture.