Do you recline your seat when flying?

Do you recline your seat when flying?
Do you recline your seat or do you think it's rude? How do you react if the passenger in front of you reclines his/her seat?

I don't care how short you are, a reclined seat will definitely crowd your tiny space. Do you think it's rude or do you feel everyone is entitled to recline, so you don't mind?
Do you recline your seat when flying?
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