Please educate me in the raiding sitution

[Cyborgazm]

I just started a week ago, and I've been lurking the forums quite a bit. I am curious: Kunark has been out for years on the server so why is there still such an issue with people abusing the system? Is it new raiding guilds popping up or are the old guilds still trying to get BiS for all their guys?

I raided in classic from vanilla to Underfoot, and I dont remember issues like this.