COPPA is the Childrens' Online Privacy Protection Act. This U.S. regulation requires us to have parent/guardian permission for anyone under the age of 13 who wishes to create a WolfQuest game or forum account. We are required to participate in this act because we ask for everyone's e-mail address when they create an account. (For more details, please visit the the FTC's COPPA site or the Wikipedia entry.
Players under age 13 will be restricted to phrase chat across all multiplayer gameplay modes to ensure their safety.
Many other countries have similar laws (some with higher age restrictions!) so we require parental consent no matter what country you live in.