Well I think it's rude for people to just come along and take everyting when your group was there first.

Whatever you do though, there will always be people that are like that on an MMOG. I find it's just common courtesy to let the group that was there already, take the claim. I'm sure you'll find more respectful characters in the world of Vana'diel though, they will be nice enough to stay away until you've done your business.