So one last message asking why this has happened doesn't appear to be a big issue of done in a reasonable way. A court of law wouldn't take much notice of the warning if in the subsequent investigation (which doesn't appear to have occurred* at the issuing of the warning) it was proved that they weren't harassing anyone.
Of course, being served a notice doesn't effect the burden of proof for a prosecution. The offence of harassment is that you pursue a course of conduct that you know, or aught to know amounts to harassment. As different people feel harassed by different things, a PIN serves to inform the alleged offender that their behaviour could be considered harassing and gives them the opportunity to stop. Should they continue, they cannot use the defence that they did not know it was harassing, because they were served a notice telling them so.
That being said, if you've been told someone is being alarmed or distressed by your contact, and then you contact them, well you're going to struggle.
Can you not see that there are ripe for abuse, especially if the person "warned" (or threatened if it wasn't the police) is not even allowed to provide their side of the story before issuance?
No. There's no need to provide their side of the story. It's a piece of paper saying this person doesn't want you to do this anymore. Anyone in their right mind just stops (or if they've not done it, continues to not do it) and moves on.
What, so you're saying that the police can take the word of some lying splitarse as gospel and just serve an harassment warning to some innocent bloke that she's decided to have a grudge against? Doesn't the bloke have a say in this matter?
Pretty much. And no, they don't. Pretty sexist to assume it'd be a woman being harassed by a man though
They have to be authorised by an inspector, who'll want to know the details, and it'd be a pointless waste of time to do one if there's no evidence of wrongdoing, so they're not quite as easy to give out as you're suggesting.
Should the person receiving the notice refuse to sign, the officer just documents that, and should they need to, gives evidence to the court that the notice was served.
A PIN is effectively words of advice made more formal do it can be used as evidence more easily.

