No-one is allowed to copy and paste any articles from external sites (predominantly news feeds) that have copyright restrictions.
The next time any such agency contacts me regarding a breach I will have no hesitation in supplying the posters full details to them.
Here, for example, are the terms and conditions from Reuters:
http://www.reuters.com/terms-of-use

Note: "In particular, you may not copy or paste Content (including Reuters news or pictures) into other web sites"

If you wish to point to an article then merely type the subject matter with a link to the site itself.