Waiting till they have low health and engaged in mobs is usually how it go’s, nothing honourable about pking or grieving. Guild and node wars, consented pvp yes great. If it’s obvious some ones in that spot don’t interfere or else expect some retaliation. Some players think there rotation includes the server as a whole. You always have the option to server hop or move a long. If you can be bothered, you can always return the favour just wait till they are a bit overstretched and give them a taste of there own. go afk out of safe zones at you own risk.