He's speaking after the new Gin Tub bar in Hove, East Sussex, installed a copper Faraday cage in its ceiling which jams signals.
While it's illegal to stop a source of signal from broadcasting, it's not illegal to jam the signal from entering your own premises.
Steve Tyler, one of the Gin Tub owners, has said: "I just wanted people to enjoy their night out at my bar, without being interrupted by their phone."
Speaking on Premier's News Hour Mal Fletcher said: "A few years ago twenty percent of British divorce cases were citing Facebook as contributing factors in their marriage breakdown, because were spending more time on their smartphone online relationships than they were in their real-time relationships.
"Psychologists even have a word for that now: absent-presence, where you have six people at the meal table at home and only three of them are actively engaged in conversation - the others are all off in cyberspace somewhere.
"The Bank of America last year conducted a study and found that it's most productive workers mingled the most with other people. So that made them re-fashion their coffee areas... In about three months they saw a ten percent boost in their productivity as a company.
He added there was hope for the smartphone generation.
"Technology's not destiny. It's not technology on its own that decides our future - it's how we respond."
