Yeah, you were practically begging for those downvotes. Not everyone sees the title and notes (instead just viewing the picture from the preview on the gallery page), let alone actually clicks on the source. And even then, the source page is in a foreign language and the explanatory picture is hidden behind a yet another link on that page. So of course nobody see that it's supposed to be joke and just downvotes it straight away. No point in blaming the users for this, the least you could have done was to put the explanatory picture in the notes. Or better yet, edit it together with the main pic before uploading.