In general, what is in stake is to find different behaviors? Some response that you will always find regardless of the specific topic that is, when confronted with the same stimulus people react differently conditioned by their specific answer. Common example is " are you dumb". Some respondent find it disgusting or nonsence to some question, others find it immoral or garbage.
If an answer does not fit in then, from a sociological point of view, there could be a very wide range of possible explanations. The only one that will not do is to believe that people are genetically determined to have a personality that will not fit into their own answer.
I agree that once your full personality has expressed itself, you might feel more "at net forum" in a attitude setting that is not the original one' you where born in. But that would be true in any case, whether personality is innate or learned. I think that in modern contexts we should be more considerate ourselves to adapt to in a healty invironment into any forum that feels adequate or acceptable to all of us.