Flap62
Sorry but you are wrong. They may perhaps have overdone it in the past while making routine calls but certainly not these days.
Jim Turner, the Boss, gives his calls in a very calm, measured cadence, the rhythm of which is a vital element for timely control responses. The synchros make their threshold calls while under high G, closing speeds of 800+kts and critical time pressure. They shout. So do the pilots calling safe on roll-backs etc.
Their calls are not a scripted part of the show. They are only audible to the spectators if Lingy chooses to broadcast his radio over the tannoy.
To describe it as an appalling nasty little habit and unprofessional reveals your ignorance of the detail of how FJ display teams operate. Unprofessional the Reds most certainly are not.