Here is an example of being over the top with the #CW feature. The admins over at aus.social instance is requiring all toots relating to #auspol to have CW enabled.

If you don't want to see auspol content, scroll and/or block accounts that participate in auspol toots.

Those of you on the same instance as me #mastondonau, CW is not required for auspol, don't feel like you are required to use it. Server rules are available on the "about" page.

https://aus.social/@AusSocialMods/109390315623687378

Aus Social Mods (@[email protected])

Reminder to all the new folks who have joined us over the past week: please make sure if you are tooting links regarding, or have commentary on AusPol, elections, political parties and your views on them, electoral politics, or geo politics you are required to use the CW feature on those toots. We understand that for some people this is a new idea so we will not be going back in time to punish folks. Whether you use the browser or one of the many apps, that feature exists whenever the text box is up. It will not hide your toots from peoples feeds, it will simply act as a subject line to allow people to opt in. This is a request to make our lives as volunteers easier, but don’t mistake that for being optional, bad actors will be removed. Please refer to the Aus Social code of conduct before asking questions https://aus.social/about (but otherwise feel free to ask questions) Big thanks from the Aus Social mod team - H

Aus.Social
@CurbsideShip116 Agree, it's ridiculous. One could with mastodon filter out any post with the #auspol hashtag in it. That's a tool that doesn't exist in twitter.
@AaronDodd @CurbsideShip116 that's a pretty blunt tool.
@Digger_71 @CurbsideShip116 I think the filters can actually be quite refined using Boolean algebra. I actually don't filter anything, but that's what I'm led to believe.