Sure, but that doesn’t mean that I’d be thanking you.
These arguments about computer crime law are always the same, and people with your view always shoot themselves in the foot with analogies like this. This is not a pre-existing social expectation. If someone comes to my front door, tells me that it’s unlocked, and tells me that they were trying peoples front doors for the intellectual thrill, there is a 0% chance that I’m an reacting positively. I challenge you to find any material proportion of well-adjusted non-nerds that don’t agree with me.
These analogies to the real world fall apart when you realize that cyberspace is filled with millions of people trying to "break into your house".. If you have an internet-connected service you need to expect people to attack it. Not so with a house.
Of course, you have every right to be upset that someone tried to do that to you. But it's clear they don't have bad intentions at least, because they let you know.