From the article:
Update: Google got back to us, and stated that Chrome’s extension policy is due to change in June 2014. The new policy will require extensions to serve a single purpose.
Yes, read that. However, that does nothing to solve the immediate problem nor does their statement mention that they will remove the offending extensions or even notify users of the problems.
Being primarily a Firefox user, I am aware of several extensions, add-ons that were found to infect your computer with adware, malware. It’s not neccesssarily a Chromr issue.