A Class Act

A note: In-game, it shows also "Requires guild reputation: Honored". Thus, I assume you can't just invite random level 85 players to get your achievement - rather, they have to be a part of the guild for a while and earn their stay, and only then count towards this achievement.

Why on earth did the gentleman or lady receive all these negatives -- while the play on words is obvious (we have classes - they have to act) - the title reference to the musical is likely correct.

1. 
   
2. Because there's no reason I can see to assume that they had the musical in mind when they named the achievement
3. 
   
4. If there were a reason, the poster failed to mention it; and therefor failed to justify his assertion.
5. 
   
6. Pointing to something that derived its reference from a still older source, and claiming the newer reference was the source, almost always gets voted down because it is seen as a source of poor education. While this usually occurs when someone (often young) notices a similarity from a cartoon, comic book, movie or pop lyric, It's just as bad when taken from a play.
7. 
   

People will rarely get voted down if they attribute something to Shakespeare which originally appeared in an earlier work; no one's expected to know everything. But trying to claim something was the source, without any justification, when an older, more widely known source is available, often does (and in my opinion should) get voted away.

It's a guild achievement.