htmlbasictutor - 5:33 am on Apr 18, 2013 (gmt 0)
IMHO, all links should open in the same window.
The target attribute was created for frames, not for web designers to manipulate how links are opened in regular pages.
Opening a link in a new window/tab will,
-as you said, create confusion
-create an accessibility issue
-annoy those who have popup blockers installed