Ex admitted on Facebook (and to police) to physically abusing me. Our children are her Facebook friends so can read the wide range of commentary. A friend commented on my ex page that I should be hit again.
She may also be in breach of Facebook terms and conditions of use.
Finally, if you wished to press charges for the physical abuse, perhaps you should take a screen shot of the statements to use it as evidence. They could also be used as an indication of her character in any future family court proceedings or custody disputes.