With the exception of "internal" forums (meaning forums such as the men's and ladies' only forums), any data posted on open forums are apt to be captured and archived by many search engines.
Many.
Google is one of the largest and most aggressive, but probably at least a dozen more that I know of.
So, removing "stuff" from the public access areas rarely affects what remains in the multiplying search data bases.
And, of course, if anyone with access to internal forums copies that data, well....
Given the salient activities of persistent hackers, those of us with higher levels of security needs must remember to avoid posting or sharing anything that would hurt or harm us or others lest that data be compromised.
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