Surely someone somewhere wonders how clever the USA and UK bans are, coming as they do on their own. Any halfwitted person intent on taking a rigged electronic gadget from the named countries and onto a flight to either the USA or the UK to either of these countries will quickly spot the way to do that - explaining it here is telling the obvious. They will take a flight to somewhere else, then continue to either the USA or the UK.
More notably, these bans are a hideous admission that the security screening hitherto employed is and has been quite ineffective - it does not guarantee an aircraft free of incendiary/explosive devices and the cost, the time and the inconvenience have been a monumental confidence trick. But, by those looking seriously at these matters, that was known all along.
I for one am not praising either the USA or the UK on this, and certainly not singling out Mr.Trump.