Online petitions aren't going to make a lot of difference. We've done this before.

No, if we're serious about this, we need to go after NYPost advertisers. Everyone who's got a full-page ad in the NYPost tomorrow should go on a list, with their corporate headquarter phone number and PR department email.

This is the way the "Christian" "Family" groups get same-sex events cancelled, liberal shows pulled, etc, ad nauseum.

They have no shame -- This is the New York Post you're talking about -- but they have a job to do. Make it hard, and they'll do what they need to do to get out of the hole.

Just a quick followup: Is there any reason why the petition doesn't call for the cartoonist to be fired?

It's a limited response, but it's what I could find on short notice. I don't have time to take the broader action you suggest, though it's a good idea. That will have to be left to others who aren't starving grad students.