ambivalent comment

Prevent this from ever happening again: Get a nice 1-2GB zip/thumb drive (whatever you call the little USB doohickies in your neck of the woods), load it up with Portable Apps (including Firefox), and use that when visiting your parents. For good measure, password-protect the whole shebang so if you lose it no one will be able to access your info. Or, more simply, just give up on anonymity. It's a very freeing thing.