That is the question! Know whether you are talking to a Person or a Member through Steam Support by pasting their replies here. We do not collect any personal data. In fact, no data at all.
Also, an incomplete list of on-duty trolls, provoking and reporting users:
If your ban resulted from talking to them, you know what to do.
Daily tip: do not create alt Steam accounts if you've been banned by Support Members. They will ban you anyway, and you should not pay them for it.