"has anyone actually scientifically proved that these devices are completly safe for consumers"
Thanks for the plug opportunity: http://www.soronlin.org.uk/mobile-phones
That's for mobile phone masts, but the maths are there to disprove your point: Using a mobile phone for 15 minutes a day has three thousand times the effect of it's regular polling of the cell for five seconds every ten minutes. Make that that five times larger for the smart meter polling interval, and it's still 600 times less than making a 15 min. phone call. The figures are for 8 hours, so we should make it three times larger, or a mere 200 times less than a 15 minute mobile phone call.
Assuming you are an average of five metres from the meter, you should reduce that by another factor of 25, since the numbers are worked out for a distance of one metre.
So having the smart meter active is 5,000 times less damaging than a 15 minute mobile phone call per day, or 333 times less than a one minute call per day.
You may not use a mobile phone for one minute or fifteen minutes a day, but many, many people use one for much longer than that. If smart meters caused any damage, then many, many people would be seriously damaged by their mobile phones. Mobile phone users are the canary that would warn of possible injury from smart meters. There is no discernible injury to mobile phone users, and therefore smart meters are safe.