Why does the UK allow these practice 121.5 calls? Why not say use 123.45 or a dedicated frequency?
Here in Asia the idiots brigade use it as a chat frequency. Additionally the Japanese and Chinese are using it endlessly to berate anybody coming near their self-created willy-waving ADIZ's.
I've lost count of the number of times I've missed a tower/approach transmission because it's been blocked by some buffoon chatting to his mate on VHF2 121.5.
Net result is a useful safety tool being rendered nearly useless as I need to turn 121.5 down or off.
So whilst those "on guard" team may be equally as annoying sometimes I understand their motives. Other than an ill-advised saying outright "you inconsiderate idiot shut-up" how else do you illustrate to your 'peers' that they are doing something that negatively affects their colleagues and general safety?