Can you somehow block incognito mode on the laptop?

So that no one can use it then?

Can you possibly block it that you can't delete the history?

No.

And that's just as well. Give others some privacy

Heard of privacy?!

Apparently not. He also wants to record the network traffic. So I don't answer either question.

No.

This is not a question of the laptop, but of the browser.

You could use a browser that is not in incognito mode.