Cedars ... I actually have more than a passing interest in Trusts Law of which Charitable Trusts are part. There is one thing stopping me from posting my own petition as it would have to be worded something along the lines of ...
"We hereby petition for the charitable status of the Watchtower Bible and Tract Society to be revoked. We believe the work of the Society does not serve the purpose of 'the advancement of religion' (of course we all know it does) under the Charities Act 2011."
As the WTBTS of Britain does advance religion (according to the law) starting my own petition would be futile and a waste of everyones time.
So yes let's all follow Phizzy's advice and vote for ...
"We hereby petition the charitable status of Jehovahs Witnesses (even though it doesn't have one). We believe the work of Jehovahs Witnesses does not serve the public benefit (even though advancing a religion does according to legislation), and is entirely self serving. We also ask the Charity Commission should take greater care in ensuring that all charitable organisations serve in the public benefit, according to the Charities Act 2006 (even though the Charities Act 2006 no longer applies to the public benefit criteria)."
If you're going to propose this sort of motion to Parliament at least get the facts correct.