If you recieved a book and repost it and a member with restrictions wants it how do you know what to tell them  if you do not know about the house it came from being smokers or having pets ect...?

I treat RC as if they only apply to MY house. We cannot be expected to know the history of books that come from any used book sources - PBS, FOLs, UBS.

Ditto what Charlie said!

If the restriction is written to apply just to my environment, I accept or decline accordingly.  If the restriction is general, I decline saying something like  "I don't know whether or not this book has been previously exposed to .... "