AIW...I believe the thread is referring to people who are being harassed while still in the congregation. When trying to root out "uncleaness" in the congregation, elders have been known to be quite strident in their efforts to "keep the congregation clean". Once someone is DF'ed, the elders generally stop making contact...in many cases, not even making the annual call to see if that unrepentant individual was ready to turn away from their "errant" course and return to the congregation.
As to your contention that JW's are well versed in the disfellowshipping policies, I disagree. JW's know you can be DF'ed when they join, but I guarantee that they don't know the extent of the "sins" you can be disciplined for. My guess is that unless you have read the Elder's Manual, you don't know those details either. For example, are you aware that there are several types of sexual misconduct, depending on the "level" of intimate contact, that can lead to varying degrees of discipline? What is considered "causing divisions" in the congregation? I can't imagine any elder wanting to have to testify about the details of these "sins" in a courtroom or deposition setting...