In the US, a pattern of police doing so could be actionable.
It would be rather difficult for most American PDs to justify devoting resources to investigating somoene being mean online unless it was in a fairly narrow set of categories (clear and specific threat, harassment, etc.).
It would be rather difficult for most American PDs to justify devoting resources to investigating somoene being mean online unless it was in a fairly narrow set of categories (clear and specific threat, harassment, etc.).