Drawings banned from Flickr's 700hoboes tag

Why are Ape Lad's and other illustrators' drawing being banned from the 700hoboes tag on Flickr? A post on Jawbone radio suggests it is because some artists are submitting more than one drawing each, but that can't be the case. No one would police that. Maybe it is because drawings aren't allowed on Flickr? Link (Previous Boing Boing coverage here)

Reader comment: Aaron says: "I noticed your story on the banning of illustrations for the 700 Hobos project. I’ve had my entire photostream rendered NIPSA [Not in Public Site Areas] simply because I’ve been uploading some drawings amongst my photos. I emailed flickr and they told me that flickr is for PHOTOS ONLY. There’s more about it here.

Reader comment: A. Koford says: "The problem has been solved, however, by relegating the hoboes to their own area (or in flickr terminology: "group") located here: http://www.flickr.com/groups/700hoboes/

"The removal from public search areas stemmed from the fact that the hoboes were cartoons and not photographs. According to the Flickr Terms of Usage agreement, only photos are displayed in public search areas (or 'tag pools' as some have labeled them). Everything else is NIPSA (Not in Public Site Areas).

"Flickr does not make it a practice to actually remove anything from member accounts very often, allowing us to utilize the group loophole. I also try to keep a few mediocre photographs on my account to keep their requirement satisfied."