Will police do anything, what should I tell friend to do?

Anonymous
One of my friends believes their ex is making fake accounts to harass/annoy them (they're blocked on every thing), there's nothing threatening in them, no threats at all, I've seen screenshots. Basically just telling them they're a loser and at one point messaging one of their friends saying they were having an affair with the wife (the ex not my friend) and my friend knew all about it. And to tell my friend to stop telling people that she's not a good person. She is a bad person however. That's a different story.

Is there any they can do legally or is it just one of those you have to ignore and hope eventually the ex gets bored and stops?

I told them since there's nothing threatening, that most likely cops won't do anything to investigate. Am I wrong? Or is there more that can be done besides reporting it to IG or whatever social account they're using?

Thank you. Please be kind.

Everything of theirs is also set to private.
Will police do anything, what should I tell friend to do?
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