I have a lot of experience on this subject and you know if you are at all aware of the RF Spectrum well folks there is a lot of shit out there. The FCC does their best but there is only so much physical spectrum available. For the technically non-inclined current physics and current technology will limit expansion of personal use devices.
It appears that a lot of equipment is starting to be affected by the crowded environment.
If anyone can find me a link to a RF Spectrum map please send me the link.