That is why most trailers come with ST tires rather than LT. You wouldn't want to do that all the time, but ST tires are made to take that kind of punishment.
I really hate to hijack this thread, but that statement deserves to be backed up the reasoning behind it. The sidewalls on an ST tire are about as sturdy as tissue paper compared to an LT tire. An LT tire will stand up to much more abuse than an ST tire.
Sorry about the hijack, but could not let that statement pass without a defiant denial.