I have not kept leos on sand, i have kept bearded dragons on sand. I had an issue when my bearded was young (turned out to be unrelated to substrate choice and was purely stressed animal) and took the sand away until it was an adult at which time i returned it and because we fed out of deep dishes we never had a problem with her ingesting the sand (we used play sand btw, never used other types/brands).

My leos have only had either paper towels or tile. Your right, every substrate has a risk although I dont see a 50gram leo lifting a 18x18 tile nor do i see them getting stuck between tiles as we have only one and it is snug to the glass (a worm cant even get between it) but i suppose I see your point on other substrates and if we had a different size enclosure. To me, it does have to do with its ability to function as a safe choice of substrate.

I do see your point (bp's and broad classifications of python) if sand works for you and it works for other members then great I just PERSONALLY wont use it for our leos because I dont like the risk, for my leos. Perhaps I dont desire to have that "experience" under my belt, to each his own. I would prefer to not be an "experienced" substrate user if that is how I would be classified. I do see how it could be used, I understand many different types of substrates but for me using tile is best for what I use it for.

Thank you for your educated input, im sure it will be of help to many members. You certainly made this an interesting debate.