On the linked to website I was hoping to see the text of the proposed amendment and whether it was going to be submitted to Congress or to a Constitutional Convention. Unfortunately, I saw neither, and the amendment was summarized using inflammatory language. Unless Sen. Franken is trying to gauge public support for his idea, I fear that signing his petition would be nothing but slacktivism.
I agree, it would be nice to see something more specific here... but petitions don't only function by applying direct political pressure, they are a time-tested way of building a list of interested supporters. As such, the inflammatory language may be deliberate: it may be a tactic to recruit highly motivated, partisan supporters with the eventual goal of mobilizing them to reach out to others in their own broader networks, or to donate to the broader outreach campaign. And I think outrage travels through the Twitters faster than policy specifics.