Most of the anime/cheap fantasy swords probably would crack/shatter on attempting to thrust them into the wood stump if they even held a sharp enough edge to do so.
@Clinton Police come to mind due to weapons disposal for firearms. They may or may not do it in your area, but even a cheap anime sword could be a deadly weapon so it makes sense. You just may need to answer questions about provenance. Call ahead to see if they are up to/open to it vs. just cold walking into a precinct with a pile of swords like you are weeb-terminator.