Certainly. I'm 15, and I joined when I was 13. Blockland was the first "real forum" that I ever visited, and I learned the hard way what they can be like. People don't have to be nice to you. People aren't necessarily here to make friends. If you're a moron, people will more than likely make fun of you. I think that Blockland made me realize that I have certain social expectations to meet when I'm online, such as spelling.
The Blockland Forums made me meaner, but they also made me smarter. I don't think it's a bad change at all.