The cost -- if someone successfully manages to spoof their way into your posterous blog -- isn't very high. You'll probably notice fairly quickly, it's hard fo

The cost -- if someone successfully manages to spoof their way into your posterous blog -- isn't very high. You'll probably notice fairly quickly, it's hard for "the bad guy" to use for actual gain, and there's no money involved either way. I use a service called Postful to send snail mail via email, that has security along these lines -- I email them a PDF with a mailing address in the subject line, and they post a letter and charge me a buck. They give security options (in my case, I include a "secret" word in the subject line, and there's a confirmation link that's emailed to me), but if I wanted, I could even let anyway send email to a given postful.com address, and it would mail a letter on my dime with no confirmation. I haven't heard about any abuses.