You are effectively stealing from another human being—not a faceless corporation. The account owner might be a student, a low-income family, or someone sharing their password only with known relatives. Hijacking their cookie means degrading their streaming quality (due to concurrent stream limits) and exposing their watch history.
Cookies also serve as a security layer and a tool for resolving technical issues. By storing encrypted authentication tokens, Netflix prevents unauthorized access to your account while ensuring you don't have to re-enter credentials constantly. COOKIES NETFLIX 1
On underground marketplaces and some forums, “cookies” sometimes refers to exported browser session cookies that allow someone to hijack authenticated sessions without needing passwords or MFA. In that context: You are effectively stealing from another human being—not