Posting here as sometimes the admin noticeboard seems a bit too quiet...

I've seen comments that this is happening more frequently now, where [[User:Foo]] will suddenly say, "I withdraw release/copyrights/permission/I just want all these 20-100+ images removed from Commons". I had one that I reverted on 10 or so images the other day where the uploader wanted images--good ones at that--from 2006 deleted because Google was indexing them on Commons. They were all images of random streets in another country.

Should the upload forms be more clear/explicit and politely in-your-face that once material is released under copyleft/GFDL, you can't technically undo that?

- Joe