The COPPA act pretty much required website owners to verify the act of any user who attempts to create an account. If they are under the age of 13, if they wanted to create an account, it would be the WEBSITE OWNER's responsibility to get parental permission to create the account, or simply reject the account all together. Most websites simply do the latter because it's easier, and kids tend to just say they are older than they really are.
Should I be worried about this? I have COPPA disabled on my forums, should I enable it? Does XenForo even have COPPA support? Or does COPPA only apply to websites which fall under FTC jurisdiction? Since I don't sell any "product" on my website, do I have safe harbor provisions? Back when I ran upnetwork.com, I pretty much had all 100+ pages of the DMCA memorized... but that was a long time ago.