But you have to remember that it isn't the pilots that get to practice on 121.5.
How do you think the D&D controllers get a license - they practice on it.
So all those pilots who say that 121.5 shouldn't be used - how would you feel if the one day that you really needed it, the controller was all a fluster!
D&D at Scottish Mil frequently use 121.5 for DF training fixes as (and i stand to be corrected) don't have a fancy locator like Swanwick.
Those guys and gals do it the old fashioned way with DF fixes form land stations and manual plotting!