Board Thread:News and Announcements/@comment-4676581-20140827160805/@comment-24042083-20140828001606

NoobxNoob wrote: ...prevents him from changing anything on any page. So does blocking...

NoobxNoob wrote: Yes, he can comment but the comments can be deleted

No, blocked users cannot comment. They can only edit their own talk page, if that option is ticked while blocking.