"What's to stop someone from creating content you don't agree with, and then putting your tag on it?"<p>You could digitally sign it using secure private key (and if you want to be really secure store the private key on a secure hardware device). Use a X509 cert from a well known CA and pretty much anyone can check whether you wrote it or not.<p>I'm saying this is a good idea though....<p>Damn - now I have to go and work out how I would implement this....