Guard police
As a current 744 jockey 12000+ hours on type i must say the most annoying people are the guard police. Firstly they, while transmitting may block someone in their range, but they may not be able to hear another pilot 250 miles further away, so butt out.
Also I heard a cargo airline trying for a relay on 123.45 after an engine failure. I asked if he could tx on guard to be told that was for emergencies only!! Lets not make people scared to use it.
Butt out Guys, you by tx ""your on guard" is as unprofessional as those who do misuse it
IMHO
AC