I am not certain that it isn't a crime, which is why I asked "what law is being broken?". It's not an unreasonable question. People have made some assumptions that this reprehensible behaviour is obviously illegal, based on their knowledge of laws in their country. But it might not be illegal in Ireland.

Clarity about law is important. It allows people to campaign for changes to the law.

Here's an old article about Ireland where someone planted hidden cameras in toilet cubicles for the purposes of sexual gratification. He was not successfully prosecuted under the Irish law. I don't know if there's been any newer law implemented to cover this.

https://www.thejournal.ie/hidden-cameras-legal-loophole-1696...

> Either way, I think calling the police in such cases is exactly the right thing to do

We don't know that they didn't call the police.