It is extremely unprofessional to use an emergency frequency for chat, showing off, telling jokes etc.. It is like dialing 911 (999) for a laugh. Note that in UK FIRs/UIRs at least, your aircraft position is immediately shown by the autotriangulation systems. Perhaps if the aircraft involved in these silly games were charged triple route charges for that flight the giggling would cease, as the 'professionals' involved appear more concerned about facing beancounters than about the safety of their fellow aviators.