First, I would like to say I will summon my dragon knight if pressed in a PK fight or going into one. To not use all the legitimate resources at my disposal is dumb tactics (ie some complain when I'm playing my cleric that using a healing spell in a PK fight is unfair...come on folks!!)...to exploit known bugs is another thing all together...
As I understand it, using a summon in a PK fight to intentionally kill a player with the intent to make them lose XP is against the server rules. I am against this too...however, I will use my summon in a PK fight (not because I want to cause someone to lose XP, but because I've worked hard to get that Dragon Knight Epic Spell and I want to be able to use it).
If I see the opponent is low on HP, then I call the summon off...
Fortunately, I've been quick enough to call off the summon in all my PK fights so far. If the unfortunate thing happens and my summon kills you and you lose XP, then I will either help you gain XP back, give you plenty of scrolls/or magic items/ or gold to make amends...just communicate with me after the fact...
That ends my interpretation of the rules on the server about PK fights and summons. Until I am specifically told "no" by a DM or DEV I will continue to use my summon in a PK fight since I am not trying to exploit a bug or cause folks to lose XP, but rather use all the resources available to my high level caster...
Glinkle Daernorn
Cleric of Calladuran Smoothhands