I've no doubt that there are bad cops out there. Probably more than a few. But I don't think it's helpful to portray the entire profession that way, even if they do bring a lot of the bad PR on themselves by how they handle the situations where a cop does behave badly.
There are others in the jail for almost 12 years.. here are the stats: https://www.cookcountysheriff.org/wp-content/uploads/2021/09...
The parent commenter was probably referring to this: https://www.urbandictionary.com/define.php?term=doxxing
Some people may enjoy having their real world identities be separate from their online presence, depending on personal preferences and how security conscious they are about that particular account.
Some communities may or may not also have additional rules about exposing your own identity, or the identities of others, which should be taken into account.