It seems to me the moderators are looking at this situation the wrong way (subjectively). As stated, this seems to be a common trend for Piratescove since the griefing issue had to be brought up again.
For the moderators to get defensive about this being brought up is in-and-of-itself rude and disrespectful to the person posting, and to others on the server who might experience the same problem. Why post something that is obviously a server-rule breaker and needs to be addressed, if the mods will just get defensive at you? A simple, "Thank you for your concerns, we will look further into the matter" seems like an appropriate response to the situation.
In addition, I don't see that B1g_P3rp's comment was directed to every moderator on the server. Only AQW and how he handles griefing from the residents of Piratescove. You can obviously tell he is having problems from them, and if all the moderator does is give a "warning" than how will they learn? You can say, "Well now they know not to do it again." Ok yes, but that doesn't stop them from telling other residents to do the same grief knowing that their punishment is a slap on the hand.
Go onto the server ban appeal forums and look at the moderator and admin responses to griefing (even minor ones). A vast majority of admins and mods were punishing the griefers with a temporary ban. If you break 1 block then yes a verbal warning seems fair. If you take out an entire farm, house, bridge, whatever..ehh now that "warning" seems like a slap on the hand.
Duelcon, you are right. Moderators do work under a set of rules given by the Admins. But, as stated numerous times by Waterworth, Fatnoob, ItsLawrence, and INEEDANAME; griefing is unacceptable in all circumstances and is punishable by a ban (temp and/or perm). It seems to me what seems to have been "tasked to do" by the Admins is that griefing needs to be punishable and shouldn't be deemed an "accident".
Reading B1g_P3rp's comment about AQW definitely shows a sign that tells me this problem has happened many times with no resolution by the "warnings" that were given out. It seems to me he has been patient with the griefing matter time and time again. But, after the 100th time of your land being griefed I too would have to agree with posting about it on the forum to get the issue out there. Maybe by the residents of Piratescove seeing this post they will realize "maybe we shouldn't destroy things that don't belong to me or my town."
I'm disappointing to see this get blasted by moderators. Instead of going after the person who post this saying this was "rude and disrespectful", why not try to help fix the problem at hand? You can tell this isn't a 1st time occurrence, and this is happening by different people who all reside in Piratescove. If a town has residents who commit multiple griefs then I 150% support someone calling that town out and saying, "Hey! Look at what your fellow residents are doing to the area around you." Don't support that kind of behavior!
I fully support this post being made public, and I hope that the griefing on B1g_P3rp's land comes to an end. I also hope that our moderators will learn to have more OBJECTIVE opinions when commenting on posts involving server rule breaking.