I think the fact that so many people follow him and don't seem to mind. If it wasn't an "okay" thing, then more people would unfollow him and Scoble would be f

I think the fact that so many people follow him and don't seem to mind. If it wasn't an "okay" thing, then more people would unfollow him and Scoble would be forced to change his tweeting behavior if he wanted to retain his large network. In other words, what's acceptable is whatever people are willing to put up with.