Hi Zack,
Well this tecnology is on it's way but simple it isn't. Copy & paste this link.
http://www.rcuniverse.com/forum/fb.a...ectrum%2Cradio

The problem is difficult to imagine but radio signal are all the same to a receiver. So if you get two transmitters on the same frequency despite the fact that you have uniquely encoded the signal, the rx will be unable to pick the good information out of the bad. The best it can do is confirm that its getting bad information i.e. interference, and go into hold or failsafe mode.
Imagine two people were speaking to you at the same time. One was talking to you about something that you could verify as true, but you had to follow their insrtuction absolutely exactly. The other one was also giving you instructions that you could verify as false but they sounded just like the "true" instructions. If you really concentrated you might be able to do it by listening for the "true" voice; but radio does not have a "voice". So now imagine doing the task again but both the speakers have exactly the same voice!
At the moment we have a technology which if universally adopted would virtually eliminate shoot down incidents, and that is channel check. So far to my knowledge only one manufacturer has introduced this system.
Regards,

john.