I suppose it's open for interpretation.
I see these people as helpful, and I can honestly say for as many threads I have read, and even less threads I have posted, there are VERY few posts attacking a person for a simple mistake.
They may question motives, they may not be all happy and kindergarten pg, but they hardly ever come right out and attack someone.
A lot of people here made mistakes when they got their snake. More than often, they are seeing a repeat of what they did, and are trying to help the new person make the best decisions.
What would you rather they say instead of "your doing it wrong"
Chances are, if it's dangerous for the snake, it's wrong.
There are suggestions being made, but for the sake of making it stick in their heads, why not just say "Do this, or that... ditch this."