Yes, it's bad form.
I think there's an issue with the organiser's event insurance, but mostly I think that if the organiser, who has gone to huge trouble to put the event on for you, says he/she doesn't want you to do it, that's the least you can do.
Also, if you post here offering a place, the RW police will come and squash your thread. So it's bad RW form too!
I'm glad you're doing the right thing about the PF. Best of luck with it.