I think that this definition "spam boards " is bit harsh. I try to avoid some boards such as altcoin discussion by posting altcoin discussion topics in beginners and help for example, but I can't do that always. Even in spammy boards we can sometimes find good posts (like altcoin discussion and economics)
It's just an example by suchmoon and doesn't really mean anything. If someone wants to find people who have never posted in Altcoin Discussion for whatever reason, then so be it.