It's the classic conundrum. Decrying something obviously by it's very nature brings more attention to it than not decrying it. Will that extra attention in a critical form hurt and diminish the influence of the thing, or increase it?

It can easily go either way. For example, let's take some cults, like Nexium or Scientology. They would have been much better off if left allow and allowed to recruit in their own ways among circles that were safe for them to do so. Exposure and large amounts of public attention and criticism didn't empower them, it collapsed them in the case of Nexium and has seriously hurt their recruitment in the case of scientology. There are lots of cases like this.

But some times, something like Trump for examples, thrives off the free media of even negative or critical coverage and is aided by it.

It's hard to tell which it's gonna be, but I can say that I think it's better for humanity, for people and their souls, to unabashedly decry and publicly renounce evil, instead of ignoring it and hoping it shrinks and goes away.