This woman — who was neither from Germany nor from Florida — ripped pages out of her passport and used them as toilet paper. The Thai government didn’t accept her altered passport, and deported her.
The lesson though may not be not to use a passport as toilet paper. The lesson is that if you do you should follow up and have the passport replaced. Ultimately it’s probably not any rougher than much of the toilet paper I’ve found in Europe. And indeed I’ve traveled plenty of places in Asia where, if one didn’t plan ahead, they might well find themselves without better options.