I have seen a UPS take a fit when a radio was near it - so i do know that some RF can in the wrong place wreck havoc - doing risk assesments and trying to work out what can and cant be taken into a computer hall in regards to these things. Phones are a major no-n0 as I have seen the effect that they have had on some units but the key fob was something that I was trying to find out about.
