People wearing headphones in public places are telling others to 'F off'

I have always felt that it is rude for people to wear headphones in public places as it is their signal to all and sundry to in effect 'F off'. They don't want to engage with the world. They are rejecting others. This implied rejection is rude even if they are strangers. 

There is a implied societal rule which states that people need to be willing to engage with each other when required in the interests of a stronger society and ultimately improve our prospects of survival.

And Greggs in Croydon (a well-known food outlet with 2,400 shops in the UK) agree with me at least to a certain extent as they have stopped serving customers who enter their store wearing headphones and with their head down looking at a phone (another example of rudeness for me).

A sign has appeared at a Croydon branch of the popular high street bakery chain, warning staff may “refuse service” if they do not adhere to the new rules.

“When in queue, remove your headphone/AirPods and come off phones or we may have to refuse service,” the sign reads.

“We get more and more customers coming in who seem to be lost in another world,” a member of staff at the Croydon branch told The Sun.

“We try to be helpful and get everyone served quickly during busy times, but it’s impossible if customers can’t hear a word you’re saying.

“The sign is pretty blunt but we have no option.”

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P.S. please forgive the occasional typo. These articles are written at breakneck speed using Dragon Dictate. I have to prepare them in around 20 mins. Also, sources for news articles are carefully selected but the news is often not independently verified. And, I rely on scientific studies but they are not 100% reliable. Finally, (!) I often express an OPINION on the news. Please share yours in a comment.