Pedophile's and the Klu Klux Klan can create Newsletters as easily as sports clubs, support groups, or any other common interests that might bind us. Don't become blindly enthusiastic, the realities will squash that enthusiasm in a hurry. Enabling people, enables ALL people. Idiots can spam you with bulk eMail and ads. Privacy is going to disintegrate.
Many people are flamingly ignorant.
For every good and rational idea spewed out on the internet, there will be 10 idiots with bull-horns, spewing their own special type of ignorance. I have found many many errors, so they don't always filter well, and sometimes remove important facts as well as debris. The internet and the information age yanks the filter away. We also have 100 people who don't know, posing as those who do. Watch the changes, see the sites, collect information, learn like never before, and enjoy the show.