Would it be safe to compost anyone's' waste? Say you have a friend over who is a habitually unhealthy eater and has been drinking all night and wants to use your composting toilet, would that be bad for it?
Also do you use a specific type of toilet paper?
I don't believe somebodies eating/drinking habits would make any difference.
"2nd hand beer" is always welcome in my book.
What you do want to avoid is using the waste from somebody taking antibiotics, as that could kill a lot of your good bacteria.
My favorite is a chocolate cupcake with white frosting and tiny ad sprinkles.