To quote the teshuva (as per BT):
However in a case where there is no proof that this activity is happening but it is merely a conjecture or suspicion, if we permit the calling of the authorities – not only would it not be an improvement (tikun olam) – but it would destroy society.
Seemingly, as long as there is reasonable suspicion (such as beyond reasonable doubt or even perponderance of the evidence), it would no longer be “merely a conjecture or suspicion” and even Rav Elyashiv would agree.
I still maintain that Rav Elyashiv was only talking about EY. To claim that the teshuva applies to anyone outside the circumstances that applies for the questioner is just conjecture.
(And yes, I know helpful & BT will disagree. They have no proof the P’sak applies in America, and repeating it will not change anyone’s mind).