This doesn't really need to be a discussion, but it should be in a place where more people will notice it. If you don't uncheck a bunch of those Email alerts you are going to get spammed something fierce--and probably already have. So, go to your Settings, go to Email, and manually go through the list unchecking things. Then you might go to your Email account and see what the damage is just for fun. Haha.
Otherwise, welcome to the site, I guess?
We're going to try to reset a few of the defaults so hopefully people won't get 100 emails when they join a popular group. Just so you know the goal of the notifications is to keep you in the loop when you're away from the site but they're not helpful when they're excessive. It's a good idea to tinker with your email settings as Liaison suggested and find the right balance. Here's a direct link to use: http://beta.linkinpark.com/profiles/profile/emailSettings