I have had the same thing happen to an EzineArticle.
FIRST: yes, it is understood that when you submit an article to EzineArticles, it is available for other sites to pick up. And, yes, that is considered a good thing. In fact, most of the authors want their articles picked up.
SECOND: However, the articles are not available to be changed by those who pick them up. Here are their published rules:
"Attention Publishers & Webmasters; Our Reprint Policies:
1. If you wish to publish/reprint any article from our site in your ezine, website, blog, forum, RSS feed or print publication, you must:
* Respect the copyrights of the authors by publishing the entire article as it is with no changes.
* Agree to include the FULL Resource box or SIG line at the end of the article.
* Agree not to change the title or content of the article in any way.
* Agree to make all links so that they are Active/Linkable with no syntax changes."
Terms of Service For Publishers Who Wish To Reprint Any Content From EzineArticles.com
I had at least one article picked up and changed - mostly the type of nonsense added that was mentioned in the original post. I'm guessing that they are trying to take the content but get credit for original content?
Any other ideas?