You just said prone to tipping in your first post... Do you actually tip it alot?
Mine Wobble a bit and I constantly have a ton of drunks in my house on weekends so Ive been worried. But I recently moved a rug around where I usually smoke... I would think would give me to time react before it burns through to the real carpet.
I heard of people using wool rugs which are suppose to be more burn resistant or maybe you could spray a rug down with something like this.
I suggest a rug no matter what you do... Last night I had a friend give me daps over the table I use, but drunk as he was he just about fell into the table. Not good for him but also not good my carpet, but my rug would have saved it.