But can the relationship among these works be considered a form in the traditional sense of the word?

It can be considered a form of call and response.

Starting a business can also be considered a form of investment.

The idea is not to kill anybody, since that's considered bad form.

For many workers, it is considered poor form to leave before the boss goes home.

It is considered poor form to campaign for the position of pope.

Because in their country it is considered not polite and very bad form to say no.

There are those who consider its action a form of assassination.

In this case, it is often considered a form of cheating.

They seem to be considered a more advanced form of magic.