Alright, to start the way you presented this seems to be.
1) You left the spawn
2) when you came back someone was there
3) You told the person it was your spawn and asked them to leave.
4) They did not, you then became the aggressor by calling in guild mates and trying to force him out.
5) He in turn showed you the same courtesy with his guild mates.
What you seemed to have missed here is as far as the person was concerned the spawn was unoccupied. They apparently did not know you and had no reason to believe you when you made a claim that it was your spawn. You also seemed to miss the fact that no one may lay claim to a spawn. Instead of accepting the fact that YOU made a mistake by leaving the spawn before you were ready to do so giving others the impression that it was unoccupied, you then acted like an arse by trying to run them off with your guilds help.
No worries, if thats the type of person you that's just the way it is. What does get me though is that you seemed surprised and upset that they returned the favor and were upset at the childishness that you started. Both parties were in the wrong because neither seemed to take a moment to think things through and handle the situation maturely, what I want to point out though is that the first wrong was indeed yours and you brought the whole situation on to yourself.
This is just what I've managed to discern from how you presented the situation.
Hope this helps.
