The journalist posted a photo of herself in the "controversial outfit". She told ABC News that she was told by a "polite" attendant that she was showing 'too much shoulder" and needed to "cover up more".
Twitter users pointed out the "double standard" with side-by-side photos of Karvelas and Julia Bishop showing bare arms in Parliament last Monday.
The Australian Parliament's "bare arms rule" has long been a topic of debate and Karvelas had already been ejected another time for the same reason.
Twitter users think it's time to change, with people calling on Australia to create "its own second amendment, the right to bare arms".