To follow art/photo hashtags, I long ago made a regex filter* in Ivory. It's not pretty but does the trick of eating any post with >5 hashtags**.
Sadly, though Bluesky*** will take regex filters, it parses them differently, and my hashtag eater doesn't work! I know one of you knows a better way.
* #\w+\X+#\w+\X+#\w+\X+#\w+\X+#\w+\X+#\w+
** because it's most likely spam or swill
*** it's for my biz; I'm not leaving Masto; don't @ me about it!