If you change the title a search won't find the article, and it may get posted...and posted...and posted...
If you need to comment within the title, add your comment in ()'s or []'s. For example:
Douglas Brinkley: John Kennedy Jr.'s most prolific mourner [What a brownnoser!]
That makes sense. I guess since this was one I had to hunt for in Google, and is 5 years old...I figured it wouldn't seem as relevant with the original title. Thanks for the good advice though.