All very true and frustrating to hear conversations on 121.5, but at the same time we have been called up numerous times on HF with the request to contact aircraft and pass on messages.
Often 123.45 doesnt cut it but yep, good ol 121.5 gets them virtually every time !
And yes, we get them to go to 123.45 to pass on the message.
And no, we dont call ourselves, ""The __" !!!