Remember, before it was implied that you gave NeoGAF the license to do the following:
1. Accept the text and unparsed BB code you type in the post submission box.
2. Store a copy of this content in a database located in server storage and/or backup storage
3. Transfer the database and database information from server to server
4. Parse the content into HTML
5. Distribute this HTML to you, the forum reader
6. Distribute this HTML to anyone else in the entire world, because even North Korea can read NeoGAF (Rights to distribute throughout the universe may or may not be necessary.)
7. Allow the web browsers of anyone receiving this HTML to render it in an arbitrary fashion, including following URLs given in post content
8. Modify or remove your content without notice before or after
9. Retain, modify, or remove content even if we deny you further access to the website
10. Continue to distribute content even if we deny you further access to the website
11. Use your content as the main attraction of the website
12. Receive revenue from the act of people viewing your content
13. Possibly some other things I'm forgetting that are inherent to the act of owning and operating an internet forum.
Now, I personally hate dealing with IP law because I think it's broken beyond simple repair, but it's the legal environment we have to operate under. Of course, there are definitely unclear meanings and unintended consequences depending on the specific language employed, so I'm sure that improvements can be made so NeoGAF can continue to run as it has without us being sued or without us being assholes.
Again, outside of avatars you don't submit picture data to us, only the URL pointing to your picture data.