This is a pretty standard arrangement for FAs. It's baked into the value proposition for the job. If this wasn't an allowable arrangement, then the airlines would probably lose a nontrivial number of flight crew.

To be frank, this whole thread makes it pretty clear who those people are who sit down next to me, glare at the FA, and bark "Doublevodkatonicandhangmycoat" without so much as a salutation. I doubt the FAs enjoy dragging luggage around much more than you enjoy looking at their luggage (and apparently becoming deeply offended by it), so they must have a good reason for bringing what is needed to do their jobs.