So, just to satisfy my curiosity, I check the classification for various photo sharing sites in the WebSense Database.
There's a good review of the
Top 10 Photo Sharing Sites here.
#1 – Photo Bucket (
www.photobucket.com)
WebSense Classification: Personal Network Storage and Backup
#2 – Flickr (
www.flickr.com)
WebSense Classification: Social Networking
#3 – WebShots (
www.webshots.com)
WebSense Classification: Social Networking
#4 – Fotki
WebSense Classification: Social Networking
#5 – Care2Connect
WebSense Classification: Service and Philanthropic Organizations
#6 – dotPhoto (
www.dotphoto.com)
WebSense Classificaiton: Personal Network Storage and Backup
#7 – AvenquestSendPhotos
WebSense Classification: Information Technology
#8 – SmugMug
WebSense Classificaiton: Personal Network Storage and Backup
#9 – MyPhotoAlbum (
www.myphotoalbum.com)
Websense Classification: Social Networking
#10 – KodakEasyShareGallary
WebSense Classificaiton: Personal Network Storage and Backup
I also checked my own site where I host my pictures and it came back as "uncategorized".
Lot's of companies block 'Social Networking' sites. Far fewer companies block 'Personal Network Storage and Backup''; however, these sites pose a significant security risk for companies concerned about DLP (Data Leakage Protection).
Anyhow - as should now be apparent - I have way too much time on my hands

- I'm writing this time up as "security related research".