Board Thread:Off Topic/@comment-27082610-20161126183941/@comment-25396609-20161209180353

If a hammer passing through them would injure them, them passing through other solid objects would hurt them.

You can't just pick and choose which sources of kinetic impact hurt them, it's all or nothing. They either ghost through everything without being hurt, or they take damage from passing through things.

Also the name doesn't fit the ability.