I'm kind of amazed that no one is suspecting arson. Marmaduke is an asshole and I'm sure there are many neighbors, dog catchers, policemen and garbagemen who would love to see this oafish Great Dane burn. They just made the fire look electrical.
I'm not a huge fan of people getting into relationships online because I think that diminishes the chance that the relationship will last (go ahead, prove me wrong) but at least Facebook is a bit more solid than MySpace so I'm not going to complain as much.
I get that the joke is linked to Brutus not being able to do anything right but this is one of those jokes you may have to read again to fully understand.