I'm another who says do NOT link. I don't know about fp because we "unlinked" by then but they couldn't cancel any of my ADR's. They say only "OasterP" can change this reservation.
However - it was a mess. I'm STILL included as a party on one of my friends reservations b/c somehow her husband became me....it's just a big mess. Overall not a bit deal, but confusing and messy.
We had two sets of friends that are all going at the same time and we realized right before making fpasses that there is no way we wanted to stay linked.
Because of my one friends account not only was I her husband, but my other friend must have been somehow too because my friend missed out on a BOG that she was THIS close to getting b/c she got the "you already have a reservation" message. She was NOT happy.
So all that to say - my opinion is stay unlinked and just print a copy for your friends