Its not only childish but very rude and disrespectful....and unnecessary.
I am not a fan and would rather Bennett was coming back....or even Maguire.....glad we didn't get Cleary.
Its OK to call someone a name occasionally when making a point, but to constantly refer to him with an insulting name shows immaturity and pettiness.
Some of the criticism (or all) may be warranted but we should at least have the decency to refer to him in a reasonable way. Criticising his actions and performance doesn't need to be insulting to his name.
BTW, my favourite was McJetski.
