First, the "study" from the original post has already been completely discredited.
And that's aside from their misleading conclusions: "as dirty as toilets" - no, just because some of the same germs might live on your face as on your bum does not mean a beard is as dirty as a toilet. And, "stuff you'd find in faecal matter" - there's a wide variety of bacteria and germs in such matter, some of which are also found outside the body as well. Again, just because there are bacteria on a face or in a beard does not mean that there are feces present.