Hi Flatulent,
Radio-control did not react at all. There are a lot of reasons for that:
They have no equipment to take bearing in mobile.
They have not enough staff to make control at all.
They have no wish to make it.
As I know they have no rx for frequencies more than 1 GHz... It could last forever without any doubt - I think that near 80 - 95 % of power radio telepfones in my country have not licences. Radio-inspection is very weak here. How do you think about illegal 10 W TV channel on 175 MHz that was made by some 20 year boy, it was working 24/7 for about a half of year in the center of capital? What was reaction? All have made antennas to receive it. As I remember I was viewing F1 races on this channel. He has terrible sound modulation... For 2 or 3 times inspectors have visited his home, but father was saying that boy is not at home at this moment, and even not stopped brodcasting - "Come next time, friends ...". As I remeber it was at 1994 when Ayrton Senna died.
That HangUp beacon was working for few weeks, firstly user was thinking that he has damage on his radiotelephone system, but after a while he has asked my friend to solve it and he has changed a channel of radiotelephone. That was at 1997 or 98.
I have made some proposal to organize private firm to clean air, but authorities do not wish to hear it - this mess is good for them... It is very simple to find location of radio-telephone base - you need to have some radio-station with control system to make short phone call from phone base to telephone number with CallerID.
73! klug.