(I'm on friendica.world.)
Settings → Addons → Content Filter (NSFW and more)

This addon searches for specified words/text in posts and collapses them. It can be used to filter content tagged with for instance # NSFW that may be deemed inappropriate at certain times or places, such as being at work. It is also useful for hiding irrelevant or annoying content from direct view.

→ check "Enable content filter", add stuff in the "Comma separated list of keywords"

both words and hashtags work.

!Friendica Support What is the correct way to make group with automatic reshares mentioned here?

I'm testing with #nsfw profile (be warned :D) @Nepříliš oblečená děvčata and no success so far.

What I have tried:

• Switching it from reshare bot to community forum with per-contact enabled reshare
  
• Switching it from reshare bot to community forum with channel resharing rule set in settings

What I have noticed is, that when I change the profile to community forum, then it seems like it does not "pull" posts as if it is when you subscribe to somebody - instead the posts are "pushed to us". It may (or may not) be relevant.

So, am I configuring it wrong or am I experiencing a bug?

Thanks guys

@Ataashi wenn ich mich richtig erinnere muss der Hashtag #NSFW im Beitrag auftauchen, dann werden die Bilder im Beitrag ausgeblendet. Dazu muss das Addon "Inhaltsfilter" aktiviert beim Empfänger aktiviert sein, unabhängig vom Addon wird das Bild bei Mastodon auch ausgeblendet. (Wenn das Bild hier nicht ausgeblendet wird, habe ich mich geirrt)