Recently, actually today, my guild was involved in an EXTREMELY malicious act of sabotage.
One of the members, xxxxxxxxxxxx, went to our guild hall and got a team of 7 henchmen and went ahead to conduct over 15 guild battles! ALL which he purposely lost. This was evidenced by by fellow guild officers who happened to be in the guild hall at that moment and noticed him popping back to the guild hall every few seconds, run to the henchmen and disappear again!

This has caused our ranking to drop tenfold and we are now unfortunately ranked over 1,400....

I am writing this to alert the community out there that there are such people around who do go around spoiling other peoples' games on purpose.
I have a couple of suggestions that I hope Anet can take note of and implement it sooner rather than later:
1)Guild Battles to be initiated only by Guild Leader and Guild Officers.
I find this to be very appropriate as no one in a guild will want someone who has no experience taking on the hordes of experienced players out there. Akin to a similar war, will an army officer allow his corporal to lead his friends out to fight a battle? I don't think so. I know that some of you may say that it serves me right for getting players like that into my guild, but I believe that the guild member who you played with for 5 hours and like him may have a similar tendency to be able to commit such a heinous act. ( you never know what a person is capable of doing).
2) Only GUILD LEADER have the right to appoint officers. This is an independant case but I believe that fellow officers should not be allowed to appoint fellow members to the rank of officer. This should be a priviledge only the leader should enjoy.
3) All guild battles to be logged. (Time of battle, team leader of each guild for battle involved). This is to allow ease of identification of the person responsible for guild battle initiations that are conducted without permission.
Anyone out there who have any comments on this are free to comment or criticise.
All i know is that my guild has been burnt by this experience and we do not wish the same fate to befall other guilds.