I'd said it before, my reason for implementing the complete turning off WLAN is the electromagnetic radiation which is not necessary during standby and ROKU could be one of the leads who care about that.
If you're worried about EM radiation you should know that an average light bulb emits about 80W of EM radiation. Not the same kinds of EM as the Roku (though there is an overlap), but I presume you're equally concerned about ALL EM radiation sources.
The Sun emits about 400,000,000,000,000,000,000,000,000 Watts of EM radiation (If Roku ever sell that many units they'll be happy bunnies). We actually _DO_I have evidence that the radiation it emits can cause cancer. Why hasn't it been banned? We should be petitioning the manufacturer for a product recall. I don't know His address, but there are a whole load of resellers around here - what resposibility are they taking?
(for all engineer/scientist/rational types out there, I know I'm not comparing things like for like, but its more of a rational argument than the recent WIFI scares).