Claims that an alleged paedophile ring forced children to drink a baby's blood were described in court as "wild and nonsensical".
Six women and four men deny playing any part in the alleged sexual abuse in Norfolk.
The abuse is said to have been carried out against two boys and three girls in and around Norwich and London.
The trial at Norwich Crown Court heard a number of abuse accusations had been made to social services.
The trial jury heard the allegations about being made to drink blood were raised by some of the children to their foster carers and then passed onto social services, then police.
Matthew McNiff, defending, told the jury: "The accusations are simply untrue."
The defendants deny all sexual charges.
They are Marie Black, 34, from Norwich, Michael Rogers, 53, from Romford, and Carol Stadler, 59, Anthony Stadler, 63, Nicola Collins, 36, Andrew Collins, 52, Judith Fuller, 31, Denise Barnes, 43, and Kathleen Adams, 84, all from Norwich.
Mr McNiff put it to Gail Barnard, a senior social worker at Norfolk County Council, that Norfolk Social Services had a climate of accepting children's accusations without question.
"The accusations are at times wild and nonsense," he said.
Miss Barnard said: "The majority of the accusations are not wild and nonsense. I am one piece in the jigsaw. I wouldn't change what I did."
The case continues.