Yeah, did that... it eventually wore right through the inner tube. Because my bike was so bloody heavy, it had lots of very subtle "rocking" to it when it was kick-stood(?), just from the wind, and maybe the road vibration combined with dirt helped, anyway, it just rubbed its way through the inner tube after 5000km. I eventually used everything from bar cork to duct tape. But that was after the initial damage was done, oh well, my tourer couldn't stay pretty. Right now I think I have a thin slab of duct tape in place, wrapped over and over onto itself, jammed in there.