I might get in trouble for this.
I once actually did burn a bible. It wasn't symbolic or representative of anything to do with religious beliefs in particular, I just did it because we were having a bonfire and I had a bible, and paper burns.
I was about 10, and went to catholic school. They gave us all a little red bible, and we all resented being given it, not because we were anti-Christian, but because we just resented everything the school did for/to us. We all just fucking hated school, so we'd express it in the pettiest of ways whenever we could.
So I got home, and...oo look, we're having a bonfire....Oo, look, I have this book, which, I suppose, represents what school want's of me, so my 10 year old brain will automatically and spitefully do the opposite...Oo, look, we don't get graded on how singed our bible isn't.
So I did it. Chucked it on there like it was nothing, because to me it was nothing. Religion wasn't, and still isn't relevant in my life, so throwing a little bible on the bonfire has never been something I'm ashamed nor proud of.
It's weird to think about, really. I had forgotten about it until now.