This looks like a healthy action by the FAs. As we all know, the FAs, pilots, and presumably other AA employees are concerned/unhappy with the bonuses being taken by AAs management employees. At this point, it seems unlikely that management will reverse course, for example by distributing the bonuses broadly among all employees. To my mind, it's healthy to communicate the concern to pax and others--in a way that seems likely to be fairly non-disruptive--and (along the way) blow off some steam. Seems likely to result in happier FAs in the short term, and perhaps a better negotiating position for them when the contract negotiations open in the coming months, which could result in happier FAs in the long-term.
-Hayden