why not have an option on your page that says " filter bots on or off" - leave the choice to the end user. If they want bots filtered on their wall they should have an option for it, if not they should be able to filter it out so their blog subscribers dont need to deal with that.
The challenge is there is no way to know if an account is being run by a human or a bot. And we certainly couldn't rely on voluntary disclosure, as people running bots would just lie and say they were human. As they say, "On the blockchain no one knows you're a fridge."