Mashiach Agent, Halachically, there is a very big difference between something said privately by one person to another person, and something said in a (VERY) public forum. When it comes to hilchos Lashon Hara, if someone is speaking to you privately because he wants help with a situation, most or all of the time you should let him speak so that you can help him. This is true even if you are not a practicing psychologist, and kal v’chomer, if you are.
When it comes to a public forum where everything that is written can be read by EVERYONE in the world FOREVER, you have to be exceedingly careful about hilchos Lashon Hara!!! Toeles is not generally relevant here- if someone needs to say something that is ordinarily LH for the same of toeles, it can not be done here. They must find a PERSON (as in a SINGLE person -not a group- and as in a real person whom you know something about). There are halachos regarding the type of person it must be:
1. It has to be a single person.
2.It has to be someone objective who will not be “mekabel” (accept) what you are saying as fact.
3.It has to be someone whom speaking to will be helpful.
4.It has to be someone who will not add to your LH, but instead help you to feel better about the person or group in question, and not lead you to have more hatred or negative feelings towards them.
These conditions can almost never apply in a VERY public forum.
Also, it is important to remember that all Jews have a portion in Olam Haba, no matter how bad they are, with a few exceptions. One exception is a BAAL LOSHON HARA! Until the advent of Internet, few people fell in the category of Baalei Loshon Hara. Unfortunately, with the advent of the internet, it has become exceedingly easy to be a baal loshon hara!! With one inappropriate sentence recorded online forever for the ENTIRE world to hear, one can easily become a baal loshon hara and be in danger of losing his Portion in the World-to-Come forever!!!!
Olam Haba is guaranteed to all of us!!! Why would anyone want to lose it??
As for the moderators, it is THEIR responsibility to make sure that no Loshon Hara is posted, since it is their site!! They can not be too careful!!! All of our Olam Habas are at stake!! Not to mention that we don’t want to push off Mashiach anymore!!!