Use them, use them a lot.

If you think about 'does this need a CW', then it does.

Things you dont want to show to your kids, your mom, your sister in law, they need CW.

Things that are a phobia, food, blood, body horror, heavy topic, politics, death, health related stuff, upsetting story, they need a CW.

This is also not a 'maybe'.
To keep the place nice, we all need to make an effort.
We need to be deliberate about giving people a chance to opt in on those topic.

Thanks