1... Havest nodes beneith the feet of fighting players, chances are they were havesting already, and was interupted, be polite and leave the node for the person who is paying for it in blood.
2... Speaking of nodes, when someone is harvesting, don't join, it's rude and it shows how shallow you are.
3... Do not stop to harvest in a group when you are running somewhere, what are you thinking?
4... Havesting all the collectables that you find in a group in dungeons is not nice, maybe someone else in the group might like a chance. Keep it up and they may hold back that heal you need out of spite. No one likes a greedy gus.
5... Don't get mad at people who harvest your zone but are levels higher. Remember havesting is like shopping at the supermarket, when you need a can of peas you have to go to the asle that has the peas in it. But then again, if you need the peas and your in a gray zone be courtous, if you can havest from and unhunted section that would be best. Remember you can go anywhere, they can't.