This is not correct and not the reason they do this.

The avoidance of karmic responsibility comes from the fact that their targets engage in compulsive behavior. They just manufacture the compulsion. For example, they provide poison soda for people to drink; people DO because they NEED the gratification of taste. They provide an injection for people to take; people DO because they NEED the feeling of safety from "danger". No one is "forced" into anything and, in fact, this is impossible. If you feel forced it's only because you can't see past your own compulsion / craving / need.

The occultist arranges the sensual conditions but YOU are responsible for your actions and beliefs, witting or unwitting. This is what absolves them from karmic consequences. It is not so much an absolution but an actual fact of nature.

So why do they go to the trouble to telegraph what they are doing through various means? Simple: mockery. They fool you, delight in doing it, and delight in rubbing it in your face while they are doing it. That's all.