Tittr doesn't have a lot of rules. Really, there's just one:
If you are are a really literal type of dude/ette, please read on for a bit more detail...
Submission Disclaimer: By participating in Tittr.com, all participants grant Tittr.com its affiliates and assigns, the right to print, publish, broadcast, and use in any manner Tittr.com deems appropriate worldwide, in any media now known or hereafter developed, including, without limitation, the World Wide Web, at any time or times, the participant's name, photographs and any language contained therein, for public information without additional consideration or compensation. Participants further release Tittr.com, its affiliates and assigns from any and all liability, claims, or damages arising out of or relating the participant's submission. All photographs submitted become the property of Tittr.com and will not be returned to the entrant.