I think that depends a bit on your definition of obscene. [It's half a joke, although maybe not as much of one as it would be if they were somewhere else. Murdering someone to get at your old enemy and then using it as an opportunity to twist the blame around to other matters isn't as obscene as say, holding an open display of your artwork depicting various horrifying things happening to other passengers while acting like it's some formal event.]
spam!
I assume you know who I am.