Most of the harsh treatment I've seen is when a member calls out a scam. Usually the scam involves a newbie with activity between 0-4. They are called out on the scam and they get pretty irate. Hopefully this gets them out of the forum as we definitely don't need these people around.
I have seen as stated above people getting mad about the same question asked over and over. Try a search for your question first. Spend 10 minutes at least to see if the answer is already in a post. Of course there are always those who just can't hold their temper or just had a bad week and taking it out on whoever annoys them first.
I understand the Members who are annoyed by seeing the same post for millionth time. It's already getting old for me and I haven't been on here very long. Let us lower ranking members answer. Find an answer that is good, then give them a merit or two. You don't have to answer the same question again, give credit to the post, and help someone level up.