[puerto]

There are many standards of ethics. I am talking about professional ethics in information security. Example of this: https://www.isc2.org/ethics/default.aspx

If you are in business of finding vulnerabilities in IT systems, you should be aware of it. If for noting else, to save yourself form situations like this.

This guy is not a security professional (yet), but running vulnerability scanners on other people systems definitely puts him in context.