The life of a dungeoncrasher is hard, especially if your dm has ruled that you can’t (or you see as too easy to) crash against the floor. Sometimes, you find yourself in an endless plain and need walls on demand.
Depending on if 3.0 is on the table, the lowest level wall spells (the tiny and melee Blockade notwithstanding) are Wall of Chains and Wall of Bones, both of which can be crossed with a full round action and/or checks, but not without them.
The question is, does this make these walls solid enough for dungeoncrasher? Which is, I suppose, synonymous to, do they block forced movement?