Just a few "Professional" pilots here with a holier than thou attitude. Such attitude such not exist.
E.g, "There are hardly no intentional calls from Professional pilots on guard. And yes, sometimes you make a mistake. But that is already contaminating the frequeny enough." from KLINK. If that is the case then the number of UNINTENTIONAL calls suggests a very serious training problem exists. Like a lot of things in aviation the CAT people (only just a few of course) seems to think everything is there for their exclusive use and benefit. IT JUST AINT SO. Get off your high horses and accept it.