Doesn't seem like something a Porsche owner, (or owner of any nice car), would do. But who knows? Sucks either way.
I recently worked on a job with a really nice guy who had a late-model Dodge hemi PU truck that someone keyed on
every single panel! 
I mean, someone took the time to walk around the truck and scratch every body panel including the hood. Worst I've ever seen. He told me that he suspects his daughter's ex-BF, but doesn't know for sure. He's a handsome Mexican guy, so I suspect that she is just smokin'.
He probably either ran the guy off, or(?)
Another buddy of mine has a new 335i BMW that got keyed on rear 1/4, half the car will need to be painted. And it's silver. It will never be right again. That is just the most dickless crime, to quote Pulp Fiction. Sorry to hear it.
