1000x this.
I'm already starting to see the idiots appearing on my server. Those who cannot seem to get their heads around the fact that if they see a node / mission item and someone is fighting beside it then perhaps, just perhaps, THAT person ALSO needs it too.
Those people use the "it will respawn in minutes, what's your problem?" excuse.
Common courtesy seems to be lost on some people.
Its a case of first come, first served. If you see someone there, wait, and see if they take it. You may be surprised by the result. If you can't wait, go find another node / mission item.
The community really needs to start acting more mature, civilised and courteous, before it becomes a copy of the stereotypical stories you hear about the WoW community.