If TSCC can discredit someone then the arguments against Mormonism become less effective. The idea is to destroy the credibility of the speaker or writer. Overt acts and open attacking an "apostate" makes the organization look very guilty. Destruction of credibility leads to the person telling truth looking foolish. Tactics have been perfected for such things and are used by organizations on a regular basis.
1. Whispering campaigns
2. Careful selection and editing of a person's words. It is very obvious this is going on when what the TBM is saying to your face bears absolutely no resemblance to what they are saying to everyone else. The problem with gossip is it often does get back to the person being talked about. This can be disconcerting to the "apostate", making them overly cautious in terms of what he or she says, and limiting his or her interactions. When the gossip consists of blatant lies this can cause the "apostate" to wonder what else is being said behind his or her back.
3. Death by a thousand cuts. A little slander here, a small lie there, a bit of gossip over there.
4. Strategically planned "slips" or comments that "just crop up" in a personal conversation with someone's boss or colleague. These comments do not need to be true and often are not.
5. Isolating the "apostate" socially. "Do not associate with apostates." This can lead to job loss, inability to obtain a comparable position, a necessity to move long distances, and isolation from former support networks.
6. Quietly encouraging a spouse to divorce the unbeliever. This does not need to come directly from the bishop or stake president. There is enough material floating around from years past that TBM friends, visiting teachers, etc will be unwitting accomplices in these efforts.
7. The above tactics have the added benefit of leading to what are referred to as "nth order effects". If you begin applying this type of stress to a person it can often lead to bankruptcy, additional stress that can increase health problems and the cost of medical care, bad decisions on the part of the "apostate", correct and incorrect accusations from the "apostate", among many other things.
All of this is much more effective than blatant attacks. It makes TSCC look like the victim and the "apostate" look like a putz. Quite a racket actually. The true perpetrator of the problem, TSCC, becomes the perceived victim. This type of turning the tables is very, very common. It is not necessary to touch a person to effectively destroy them.