Why is verification important?
Verification is required for all Disqus forums - If your account is not registered, you won't be able to post a comment as a registered user! If you have an unverified account, you'll only be able to comment as a guest, which is an option offered by some, but not all forums.
No impersonators - Verifying your email prevents others from using your email address when posting on sites using Disqus.
Fewer trolls and spammers in the discussions you love - Requiring email verification makes it harder for trolls and spammers to create accounts with fake email addresses.
Commenters are initially given the option to verify their email address after creating an account though verification links do expire over time. A new verification email can be requested from our email verification page accessible through your profile settings.