Can the characters in a calligraphy work be mixed with traditional and simplified Chinese characters?

Recently, a professional calligraphy and painting art website in China asked, "Can traditional and simplified Chinese characters be mixed in calligraphy works?" For the topic, a research and discussion on calligraphy art was launched. There are three general viewpoints:

1. In a calligraphy art work, it is better not to use simplified Chinese characters;

2. In a calligraphy art work, if you want to use traditional Chinese characters, you have to be complicated; On the contrary, it is simple and simple;

3. In a calligraphy art work, we advocate the combination of traditional and simplified Chinese characters, and we are free to do whatever we want.