I'm just being overly technical
If you're hiding something, you're taking effort to actively conceal it from display. As opposed to don't show which is a passive act; it is not taking the active act of display.
For the vast bulk of those items, the correct semantic meaning isn't to use the word 'hide', because with the exception of ignored users posts, you're simply not doing the work when you're 'not showing' these things, as opposed to working to conceal them.
So getting overly technical, we should definitely reword them to not only be more obvious to the user but also to actually describe the action being taken under the hood, i.e. taking effort to actually show these things.
Now, saying that and then actually going through all of the options to determine where double-neagtives exist are two different things (mostly due to the sheer volume of options and screens and what not).





