I imagine we're not far away.
But we already eat/inhale feces on a daily basis anyway. It gets on your tooth brush whenever you flush the toilet, for instance - you'd be amazed how far away those particles travel! It's just in such minor doses it doesn't hurt us. Washing hands and all that good stuff merely reduces the incidence of bacteria, not the presence.
Also keep in mind you eat vegetables which tend to have been fertilised with manure. That's washed out, but it doesn't change the fact every veggie you eat was once underneath a pile of excrement.
I don't think the poop actually is put in the brew, anyway - I think it's just used to fertilise the leaves. So, same principle as ordinary vegetables.