If a client has desires or beliefs that are against the law then the T in no way has to, or should, agree with them. They don't have to report a client for having "bad" desires (like a T who treats criminals) but they do have to report someone who has expressed plans to ACT on those desires. That's part if the training since more often than not Ts have clients who's belief system is very different than their own. Some Ts will refer certain clients out who have beliefs or traits that they just can't get past.
This is part of the reason Ts keep their personal beliefs to themselves too, since it can happen in the reverse. A t might believe in something totally legal but against your personal belief system. If a client finds out it can change the whole dynamic for the worse.

Sent from my iPhone using Tapatalk