We are a great family. Sometimes we have some scolds between each other, but that's a part of the thrilling. The majority of the people here are well-intentioned, and proud of helping another people with their knowledges.
There are another guys who come here to get their homeworks done, but it is an easy thing to identify them. Another guys come here and ask a very very short question like: "what's (+5 or 6 words more)" and never reply your answer again and not give you some type of acknowledgment. So you answer them and not obtain nothing. I have learned about not answer any thread that hasn't got a minimum amount of words or some introduction. The impoliteness of the people is growing exponentially.
By the way, I don't have any source of comparison, because as soon as I installed internet in my computer, this was the first science forum I visited. And I stayed here since then.