Beg to differ!
I once enjoyed a packet if dry roasted in a Patcham hostelry,the barman inadvertently poured me a pint that was 2/3 pipe cleaner,the peanuts exited my nippsy 4 minutes later,unfortunately trousers were still being removed at the time!
No way. Firstly no beer would be mixed with pipe line cleaner unless the person did not know how to clean pipes. Beer ends or taken off, water connected, pipe cleaner, water flushed, beer re-connected. Secondly pipe cleaner is blend of caustic alkali and chlorine based bleaching agent, so drinking that would not cause you to have a shit but put you in a life threatening position in hospital.
I base this info on owning 4 pubs!