During my forty+ year stint in customer support/relations, a few hard core truths have emerged.
One of them is people who publicly admonish volunteers are not really looking for problems to be solved. They are looking for attention or looking to raise themselves above those who have authority.
Best advice I can give anyone is to ignore people like this. I will also state we (HTC) have a zero-tolerance attitude towards those who do chose to be derogatory towards players who volunteer their free time to give back to the community.
There is a right way and a wrong way to address any concerns or issues you have with any event. This particular thread displays the incorrect way to do it. If you cannot be respectful, then you are going to go about it all wrong.