Isn't it illegal for some calligraphers to pretend to be members and directors of an association?

Strictly speaking, it is illegal to impersonate any other person or group, but if there is no substantial harm to the other party, then the responsibility for this violation is very small. It is very difficult to obtain evidence at the same time, even if it is serious, it is difficult to pursue it. Because the law must investigate the responsibility according to the actual harm caused to the other party. Calligraphers Association is just a non-governmental organization. The cost of accountability is generally calculated. Forget it, it's moral condemnation at best.