I understand the need for caution in making allegations of sexual abuse and investigating the source of the complaints (i.e. USAG's policy of needing complaints to come from the victim or victim's family). Rivals will do some crazy things...when I was in figure skating, coaches who were competition for other people's students would try to call immigration services to get other coaches deported. At my gym, recently a coach reported suspected sexual abuse (not sure if it was by a coach or someone else in the child's life) - allegation turned out to be untrue and there was a huge mess for our gym and for the child and their family. But STILL, everything notwithstanding, you REPORT, REPORT, REPORT. Report to the police. And if you report to USAG, they have GOT to investigate it - or if they don't have the resources, delegate it to law enforcement. As far as the bad image of the sport goes (which I know USAG cares about) 1) doesn't matter as much as children's safety and 2) there won't be much press until the indictment anyway, at which point it's more than just a hearsay situation.
I imagine USAG hesitates to take action because of not wanting to make false allegations or have this stuff come out in the media and make this sport look bad. But every time it comes out that an abusive coach was arrested and charged, or banned from coaching, that should be a strike in FAVOR of gymnastics and USAG - since it means that they are on top of things and ensuring that young gymnasts are protected. And we should definitely be more comfortable with excessive investigation of reports that turn out to be false, than with no investigations at all.
I imagine USAG hesitates to take action because of not wanting to make false allegations or have this stuff come out in the media and make this sport look bad. But every time it comes out that an abusive coach was arrested and charged, or banned from coaching, that should be a strike in FAVOR of gymnastics and USAG - since it means that they are on top of things and ensuring that young gymnasts are protected. And we should definitely be more comfortable with excessive investigation of reports that turn out to be false, than with no investigations at all.