The purpose of my proposal is to prevent preditors from coming to the forum
In a place without KYC, age limits are useless. How about we disallow predators from joining, instead of kids who are interested in the possible future of money?
It is not necessary to disallow predators from joining. If we don't want preditors to join, we can simply remove the incentives a preditor might have to join the forum. Some preditors might join anyway, but they will probably not prey on kids on the forum.
If someone is talking about their homework, IMO they are more likely to be in their 20's than a softmore or a freshman in high school (at least on these forums). So if someone is a freshman in high school, talking about homework, a potential predator would have no idea how old they are, and the person would most likely be an adult. This means this person is not going to get preyed on (hopefully).