I have blog create for my staff in sharepoint. The staff are all users. But when they comment on some posts, they want to comment as anonymous. Is there a way for it without an external solutions?
I found a solution to this here Basically you have to break inheritance on the Comments library and allow anonymous users to add items.
There's and Microsoft custom web part for that! With an overwhelming request to providing users the capability to display blog post anonymously, Microsoft created a web part you can download on CodePlex that should meet your needs.
Check it out!