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@tasfleur wrote:

 

It works for us, but I can appreciate (as well as sympathise) that it is addictive for the majority as well as useful and meaningful to them.

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It's not necessarily an addiction, more a way of keeping in touch with the family and friends whether they live near by or far away.  The oldies are loving the way they can share news with their grand children and see pics of their great grandchildren or video chat with them all.  Around here people use facebook to buy, sell and give away stuff, promote businesses and charity events or anything really.