Twitter (t.co) “infected” according to Google

Oops URL Shortening Service “bit.ly” Flagged as Malicious by Google and Firefox http://www.techworm.net/2014/10/oops-url-shortening-service-...

I think bit.ly also is flagged. Will if I hide malicious content in some with URL shortner will Google classify the whole URL shortner domain as malicious ?