Yes it does sound very far-fetched. But then again, until recently, so did the idea of weather control, but we now know cloud-seeding has taken place all over the world - the best example being Russian pilots ordered to form rain clouds to ensure the radioactive fallout from Chernobyl fell over Belarus and not St. Petersburg and Moscow. How we made the Chernobyl rain

I also assume most of us are aware that it is possible to be brainwashed into believing a whole new set of values that run contrary to those held before. Brainwashing Technique

Lesser known, maybe, are the studies that have been carried out using binaural audio and hemi-sync techniques that can induce enhanced hypnotic and telepathic states in certain individuals. The Monroe Institute in Virginia is one such place openly espousing these ideas. Monroe Institute Website

Then there is this scientific research that shows that brainwaves can be altered simply by the proximity of a person to a cellphone. Mind Control by Cell Phone

So, if we put all of this together we must admit that there is a possibility that the kind of technology this 'victim' talks about may be readily available to certain institutions interested in this sort of thing.

The next question we must answer then becomes; 'Why would they be targeting this person, or the other commentators on the OPs link that also claim to be victims of such technology?'