often MusicBrainz editors will use tags to mark data that needs to be fixed. I think these tags should be filtered when displaying tags on artist and album pages. some common tags are

• Tag “fixme” and many variants thereof (with and without spaces)
• Tag “likedis auto” from an old artist import

we might also add some common prefixes, like punctuation. a few examples from editors I know

• _ is used extensively by Aerozol and RandomMushroom128
• *** is used by me (technically *ur_, but still)

we do want to not just include all punctuation, as quotes, hashtags, and the Spanish question and exclamation mark can (and would likely) also appear at the start of a tag