I support the use of thumbs for nude and violent images I think its a great rule and has taken me less then 15 sec to add it to the image..

I have been known to post a few nudes and I see no problem with using the thumb to hide it
the reason i like it so much is sometimes my 6 year old sits in my lap while i click around to different images and its great cause I can always tell what not to click on while hes in my lap including some of my own images I would not click on while hes in my lap.

nothing worse then having a kid in your lap click on an image and try to click the little X in the right hand corner fast enough before he ask questions lol
Miranda