Allow me to clarify and, hopefully, put this matter to rest...
Our forums have writing sections where "grammar policing" is usually appropriate. Indeed, it would be a disservice not to point out errors in someone's manuscript when they were asking for comments on their work.
Our forums also have a large number of casual conversation topics where proper grammar is neither expected nor required. In the vast majority of cases pointing out spelling errors or small grammatical errors is usually perceived to be rude and unnecessary.
Care should be taken to determine the nature of the post and reply accordingly. We absolutely want to offer advice when it is sought, we do not want to beat someone over the head with it every time they make a mistake. If we did poor Qray's head would be all dented...I mean...um...er....Hey! Is that Elvis?!
I will also touch on moderator's roles very briefly since it was mentioned. Moderators are members and are free to share their opinions on any topic they choose under the same terms as all members. However, I do expect them to be good examples of how conversations should be conducted...no flames, etc. Are they perfect? Well, are you? I'm sure not. Keep that in mind and give them a break if you think they are going too far. You can ALWAYS contact me via PM to ask for assistance or clarification. If you don't do that I can't help you with whatever your issue might be so please give me the the chance to make things better OK?