First I question this guys paranoia when reading this.
"A SafeGuard Apron worn on the body will block the electric fields very nicely. Another option is to wear a shielded shirt. Shielded Gloves can be used to protect the hands."
Hes talking about a laptop, not uranium, or something else that I could at least see being concerned about.
And secondly you are correct about the copper sheilding, for some reason my brain switched to thinking about RF interference.
but surrounding a monitor by a "magnetic piece of metal" is still a bad idea as far as your monitor is concerned.