This is bit bizarre to me, but we have one user arguing that our policy on notability which specifies,
The idea here is that once a large number of people are exposed to the claim, it is of general interest to validate the claim and either confirm or refute it.
is not satisfied by an online petition. While an online petition is NOT evidence of belief -- you can sign a petition without believing the outcome possible -- it does seem to be evidence of exposure. I'm not sure how we can realistically better quantify exposure.
Would a change.org petition with 50,000+ signatures be evidence enough of a "a large number of people are exposed to the claim"?