"On any given day, you can get it wrong, " said Peter Thompson, a longtime coach and former official with IAAF, track and field's governing body.

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"If you're alone, you have to make sure that if something goes wrong, you can get out of it, " she said.

CNN: STORY HIGHLIGHTS

"There have always been specific provisions under UK law, from long before the first day of the internet, that said if you are in possession of information that identifies a wrong-doer then you can be ordered to hand it over, " said Mr Lockett.

BBC: Websites forced to reveal user identity