I only know two and they are
1. Not discussing issues and not supporting them with information.
2. Not giving advice on what to say/talk about.
That is because critics and academics are rarely open to new ideas and expanding the understanding of art. Similar thing was about movies when they first started appearing, and also about comic books. There are many critics who would still not accept these, or weaving as forms of art, but it's a never-ending expanding list and soon even video games might be considered art.
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