As you know, we pride ourselves on being part of a friendly, grown up guild that putters along quite nicely without all that messy "drama" that can often infest any environment with a bunch of people.
In order to keep things like this, it basically involves being aware of any problems and dealing with them BEFORE they become anything bigger. Part of this process involves you guys .. you are our eyes and ears and, if you notice something going on that doesn't seem right it is better to have done something about it and it turning out to be nothing, than to do nothing and it turns into some horrible drama monster!
I know we have a lot of stuff written down in our "Rules" section .. most of it is there because, at some point or another in the past, it wasn't there and it was assumed to be obvious .. until it turned out it wasn't. However, we can't write down every individual thing that most of us would take for granted just in case someone else doesn't, or we'd never get to the end of it.
You know how the guild works, you know what sort of environment you want to be in and, hopefully, we are that environment ... and most of you have been with us long enough to know what is and what is not acceptable. Part of that is simply being friendly. If you are having a bad day, try not to take it out on guild members .. be aware of your own actions and if you feel you perhaps went too far, make sure to acknowledge and apologise for it. We're all human, we all make mistakes .. and we encourage people to own up. If they don't, then we'll just blame a rogue. Or a hunter. 
Also understand that everyone plays WoW differently, but it is their leisure time .. if you have questions or wish to discuss something generally, it is better to put it out on guild chat than to whisper someone privately. That can distract from something they may be in the middle of (raiding, BG's, a complicated quest, etc) and can eat up their limited time set aside to play. Obviously on some occasions it is better to have a conversation in private .. but be aware that, if they are in the middle of something (or are /afk) then you may not get a response straight away, if at all.
On the flip side of that, if you are receiving private messages from a guild member (via whisper, real ID, Battlenet or any other medium) that are unwelcome, inopportune, inappropriate, persistent or just plain annoying, the best course of action initially is to encourage the sender to keep chat to guild chat. If that does not work, please let myself or one of the officers know. If they are not a guild member .. ask them to desist or they will be reported and, if they don't, report to Blizzard and /ignore.
Above all, keep it light, keep it fun and enjoy 
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) and, if that's the case, we can keep an eye on things and perhaps do something about it.