People have been uploading very inappropriate songs as Meshes to bypass moderation, such as this one:
Despite it being a Mesh, you can still put its ID into a Sound object and play it in-game.
You should not be able to play a sound if the sound ID doesn’t lead to an actual Audio file.
This was patched a while ago but the bypassed meshes as audio weren’t deleted but I been actively going around collecting the IDs of these bypassed meshes as audios and reporting it to the moderation team. So far about 20+ have been deleted but I’m sure there is a lot more out there.