Let me put it this way. I spent 13 years in the army, many of them heavily involved with radio comms as an NCO. Now, the army comms gear is many, many more times powerful than any wi-fi gear that gets used, and so far thousands od servicemen have totally failed to keel over with exploding skulls and eye sockets on fire. Personally I really disliked the way that the signal was referred to as 'radiation', and almost all of the laguage used was ambiguous and scare mongering. Lots of 'possibly', 'maybe', 'perhaps' were used. I did not hear one 'definitely'. A scare story, nothing more, however I think that a proper investigation would not go amiss though.
This is the problem with most people's argument on here. You presume that because nobody has yet grown a second head that there can't be any dangers with Wi-Fi. Yes, the show was one-sided, but did you expect anything else? It was a show to alert us to the fact that this "amazing" technology that we have all taken to our hearts, and installed in our homes and buildings, might actually need further testing to make sure it isn't a danger to us.
Don't forget, children have far thinner skulls than adults, so the effects, if there are any will be greater on them.
If nothing else, the show probably did us all a favour. Those that don't currently have Wi-Fi networks might not be asked to install them now. Your job has possibly just been made easier.