Unfortunately it's not confined to simply "harassment" but anything "offensive, inappropriate or objectionable" by their own wording, which is highly subjective. If there's a legal issue, BBC should contact law enforcement, but beyond that informing others feels entirely punitive.
If anything, this opens up many opportunities of abuse from nefarious and mischief inclined people.
Lesson to take from this is, don't do personal stuff upon work computers period. That should be the take away message about this type of issue. Remember many an employment contract prohibit that and it is often overlooked if not abused, this may just become that abuse nail example you encounter with HR. Let alone the security aspects for you and your employer, your cloud drive getting a malware payload not impossible and vice versa.
Defamation is unlawful and is never investigated nor prosecuted by police.
If it is really that important, the company should just purchase the licenses for their employees, as a perquisite. Then it no longer has the need to police the private lives of its workers, in order to see if they need to be fired for illicit, unlicensed television-watching.