depends on your threat model... if peaces bigger than dust are left over, they might still contain quite a lot of info, right?
If you mean a big sledgehammer, maybe. Speaking from experience, even with a chisel making more than a dent in a modern harddrive with a hammer in ways that can't be fixed by replacing a pcb or other parts is hard work.
Aren't commercial degaussers still a thing? A hammer still leaves big chunks.
They are, and aren't that expensive. Our IT support team has one for workstation drives in a company with around 1000 employees.