@Seizan,
I think everyone has offered opinions on the pros and cons, personally I think his approach is a tad pissy and unwise. But it sounds as if he wants to know if the wording is acceptable, yes it is acceptable if his goal is to be rude. Totally up to the group of artists, if they want to go this route, they should go this route. I think it’s unwise, but again, my working experience is different and I seldom found the temporary pleasure of insulting people to be a great boon to future endeavors.