Every single flight I take, there are multiple "You're on guard" calls I hear, even though I never heard the one being the reason for the police call. The range circle you have when transmitting is never taken into account by the policemen... There actually might be several transmitted for a single accidental call to maintenance on 121,5.
Why not let ATC watch over guard freq, it's them who are responsible for it.
All you guard police men are doing more harm then good with your calls...
Nic