Watch anonymously on Netflix?

Can you also watch netflix so that the other person who also has a profile does not see that you are streaming?

No. It shows what you have recently looked at and if the other wants to use his account, there are also problems.

Create new profile, watch what you wanted to watch, delete profile again.

You could e.g. Look at the profile of a person who is not that often on Netflix. Then you could look there and the person on the profile would notice it less often