Whilst I know everyone likes to see that all things are "transparent and above board" these days, I think the OP shows how easy it is for such transparency to lead to all sorts of threats ( illegal or otherwise ) . Its not pleasant to end up with such a situation.
The fact is that planning applications these days are online and it is possible to see who has written letters of objection or raised issues. Names are not secret anymore ( I say anymore because in the past you could object and all an applicant would be told is that " there were objections".
Now, all obvious and if you object your neighbours are all given the information.
In many respects this means that sometimes you don't object even if you want to because it will inevitably lead to words, issues, bad feelings or even threats.
Not everything changes for the better.
I know, I have been there and decided not to object because I didn't want anyone threatening me.
The problem is, that some people will be like this and even when confronted by police.
How does a 'lived experience' differ from an 'experience'?
Acute anxiety after death of my husband