The MSN article on this was very thin on details. I don't believe the anon person posting these accusations really was someone who knew him.
He isn't giving his real name, so that complicates legal action. There are questions about whether the photos he posts to prove his connection with the family are real
@AlphaCentauri The man said he was a nanny for another kid, and they came into contact with Barron quite often as the boys went to the same school.
What gives credence to the story is the trumps haven't come after him.