Personally, I think arilines should encourage it! After all, pay for new hire F/A's is pretty tragic and demoralizing.

If the F/A's could pick up an extra $20-30 bucks/trip, it stands to reason that the service received inflight might improve. And equally as important, one would think that F/A attitude toward the customer might improve. It stands to reason that the cabin crew would be spending more time in the cabin 'working the passengers.'

A well phrased announcement of the 'new policy' could be made inflight, just prior to the first beverage service just to familiarize psgrs to this new 'service enhancement.' I doubt that few psgrs would object.

Just an idea, which would appear to benefit the F/A crew, and cost the airlines virtually nothing.