I dunno, this is pretty harsh punishment. He can't eat food, his family can't go near them, he can't go outside, or even leave the basement without endangering people. His life is ruined (ignoring the eventual shift back to the status quo), and he could end up killing his innocent family at any time. It was dumb of him to take the genie lamp from the Cave of Wonders, but Victorious was a consenting adult and she wasn't in any sort of romantic relationship with Doom. Doom would have probably been much less upset if Victorious didn't humiliate him publicly with it.