A grizzly bear in Banff, Canada, has been charging people, and recently wandered through a girls rugby practice session.
Leave it to Canadia to screw up rugby. Even as pansified as the Brits are, I suspect they'd have called a 99 on that punk bear and made it wish for euthanasia.
As for the petition, require it to take the form of an acceptance of liability; you sign it, you share the cost of any damage or injury the bear causes.