As it says in the title, spidertrons cannot be marked for deconstruction by using a deconstruction planner, even though there is a filter for it to whitelist it in the deconstruction planner. They can also not be deconstructed by using the "cut" or "shift" + "cut" operations.
I don't know if this is a bug, or if it is just not implemented. If it's not implemented, then I'm sorry for posting this on the wrong board