Store sensitive documents on Google?

Storing sensitive or personal documents on Google, or any other online storage facility, come to that, is asking for trouble. That said, Google Documents does have a useful role. I store basic document letterheads, spreadsheet templates, etc. just in case I need them urgently and have no other way of accessing them - a catastrophic failure of my laptop, for instance. I can then use my templates on a client's or colleague's machine, save the completed document to removable media and shred the original. I cannot see that storing sensitive documents online is any less incompetent than leaving a laptop in a taxi or failing to securely delete data from a no longer required hard drive. In security matters one should always consider the internet a leaking sieve.