While I've performed a few silly pranks (like swapping runestones around) and I've stolen some stuff from, well, everywhere (though I can promise that if someone has taken stuff from your place since that time, Malicus, I am not the culprit) I don't think I've done anything truly assholish (depends on the definition, of course - i'm using the horribly vague 'doing things not in the spirit of the game') until this, and it's because of the way it was done and not because of the action itself that I'm sorry about it. Keep in mind that you guys - and I mean this with great respect - are a threat, not an active one to my life but one that would make it difficult to compete in any area of the game. I believe that sabotage under normal circumstances (that is, not using an expendable alt) for the purposes of slowing down your development to allow myself the chance to catch up is a perfectly legitimate tactic and one you should be prepared to defend against/cope with.
I should point out that, having punished myself through a permadeath that I feel counteracts any advantage I may have gained from my actions, I have now changed my main's name for (at least temporary) protection, since i'm not too keen on getting beat up by people who are getting crazy LP from stuck bears and will probably have a 100% hit rate on me. I consider this reasonable, as I feel reincarnation should mean a chance to avoid the mistakes of previous lives. I know that you guys are capable of coping with the effects for now and hope that your loss can be replaced in the not too far future, and I look forward to our future interactions, whatever form they may take.