Before getting to the main topic, I'm going to take a stab in the dark and say that COPPA can be said not to even exist, because from what I know if you're under 13 and want to register for the forums without parental consent, no one is going to stop you. The main reason for COPPA is to protect kids from sensitive material that could affect them negatively, but unlike other forums and from what I've seen so far, PC is a really "clean" and friendly forum in a sense, but I think that the bar should still be set at 13. I'll try to prove my viewpoints in the paragraphs below.
First of all, maturity level. It'll be a sweeping statement to say that everyone below 13 isn't mature and typeslkyethis b/c yoloswag yo, but if you look at other forums (e.g MineCraft Forums), you'll see many people who are in the 12-14 age range typing in that style. Typing that way not only makes the forum hard to read, it also dosen't facilitate discussion. For the kids below 13 that are able to conduct themselves maturely, then I think they'll be mature enough to ask their parents.
Second, will be the exposure that kids get. There will be the occasional user who goes around using horrible language and despite the censors it'll grow on the child over time, and some of the topics in the Discussion and Debates section may be too mature or too sensitive for kids to handle appropriately. And in the event of occasional flame wars the kid may get because of the reason in the above paragraph, it'll leave a negative impression on him.
The community at PC is really friendly and I have yet to meet people that rub me the wrong way or even trolls on the forum, so if not for the benefit of the majority of the members that are over 13, this seems like a fine environment for kids to browse through, but not to get involved. It is the Internet after all, and by going through COPPA they'll have parental guidance and be able to better navigate and contribute to the forums in whatever way they can.
While COPPA should be kept, I feel that there needs to be a system that can more accurately weed out the members who are faking their age to get in, because without chatting with them privately which they may not want to, you can't prove that they're under 13. Personally, it's not about the age, it's about the maturity level, so COPPA can only do so much. If a six year old comes on here, evades the system and contributes really actively to the forums, why not? It's not correct, but age only has a general relationship with maturity level.
^~^For walls of text.^~^