Here’s the real reason why flight attendants greet passengers when they board — they’re not just being friendly

She revealed that their greeting is “to check whether you are too drunk or sick to fly,” adding that it also is helpful “to see who could help us in an emergency.”

In industry terms, crew members are looking for “able-bodied passengers (ABPs)” who could potentially assist in “evacuating an aircraft.”

They want to look for the opposite as well so that they don’t place certain passengers — including children, the elderly and those with physical and mental disabilities — in an exit row, where a lack of mobility could impede an evacuation.

An airline welcoming committee also acts as an unofficial second security checkpoint.

Airplane greeters check for suspicious bags like coolers and, as Rania indicated, also try to determine whether passengers are too drunk to fly by giving everyone a quick “hello.”

Commenters shared mixed feelings about learning the truth behind the hospitable-seeming measure.

“Flight attendants should mind their business,” one viewer bizarrely said, while another wrote, “I knew you were judging me!”

“I was expecting ‘because they have to’” said a third.

Interestingly, commenters seemed most perturbed by crew members’ purported drunk-testing duties.

“I have to be drunk to fly otherwise I’m terrified,” fretted one viewer before asking for “any tips” to help them.

Another claimed, “Once I had to take a breathalyzer because I said to the really pretty flight attendant ‘good night’ when she said hello. I was sober.”

Nonetheless, testing whether or not passengers are tipsy appears increasingly essential given the spate of booze-fueled shenanigans plaguing the friendly skies of late.